From ee5c1c87f63d3ab53d5fedfeffbc9e3233aeaad2 Mon Sep 17 00:00:00 2001 From: Notletterday <1305638814@qq.com> Date: Thu, 8 Jan 2026 17:49:05 +0800 Subject: [PATCH] =?UTF-8?q?=E5=AE=8C=E6=88=90=E4=BD=9C=E4=B8=9A?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- exercises/00_hello_world/main.cpp | 2 +- exercises/01_variable&add/main.cpp | 1 + exercises/02_function/main.cpp | 3 +- exercises/03_argument¶meter/main.cpp | 8 +-- exercises/04_static/main.cpp | 10 +-- exercises/05_constexpr/main.cpp | 2 +- exercises/06_array/main.cpp | 4 +- exercises/07_loop/main.cpp | 4 +- exercises/08_pointer/main.cpp | 4 ++ exercises/09_enum&union/main.cpp | 2 +- exercises/10_trivial/main.cpp | 8 ++- exercises/11_method/main.cpp | 5 +- exercises/12_method_const/main.cpp | 3 +- exercises/13_class/main.cpp | 12 ++-- exercises/14_class_destruct/main.cpp | 18 +++-- exercises/15_class_clone/main.cpp | 20 ++++-- exercises/16_class_move/main.cpp | 31 +++++++-- exercises/17_class_derive/main.cpp | 12 ++-- exercises/18_class_virtual/main.cpp | 40 +++++------ exercises/19_class_virtual_destruct/main.cpp | 28 ++++---- exercises/20_function_template/main.cpp | 7 +- exercises/21_runtime_datatype/main.cpp | 11 ++- exercises/22_class_template/main.cpp | 36 ++++++++++ exercises/23_template_const/main.cpp | 5 ++ exercises/24_std_array/main.cpp | 16 ++--- exercises/25_std_vector/main.cpp | 70 ++++++++++---------- exercises/26_std_vector_bool/main.cpp | 18 ++--- exercises/27_strides/main.cpp | 5 ++ exercises/28_std_string/main.cpp | 6 +- exercises/29_std_map/main.cpp | 2 + exercises/30_std_unique_ptr/main.cpp | 5 +- exercises/31_std_shared_ptr/main.cpp | 18 ++--- exercises/32_std_transform/main.cpp | 2 + exercises/33_std_accumulate/main.cpp | 4 +- xmake.lua | 4 +- 35 files changed, 271 insertions(+), 155 deletions(-) diff --git a/exercises/00_hello_world/main.cpp b/exercises/00_hello_world/main.cpp index 8866f3c15..fa454e132 100644 --- a/exercises/00_hello_world/main.cpp +++ b/exercises/00_hello_world/main.cpp @@ -6,6 +6,6 @@ int main(int argc, char **argv) { // TODO: 在控制台输出 "Hello, InfiniTensor!" 并换行 - std::cout : "Hello, InfiniTensor!" + std::endl; + std::cout << "Hello, InfiniTensor!" << std::endl; return 0; } diff --git a/exercises/01_variable&add/main.cpp b/exercises/01_variable&add/main.cpp index 5014863fd..71fabf2b4 100644 --- a/exercises/01_variable&add/main.cpp +++ b/exercises/01_variable&add/main.cpp @@ -5,6 +5,7 @@ int main(int argc, char **argv) { // TODO: 补全变量定义并打印加法运算 // x ? + int x = 1; std::cout << x << " + " << x << " = " << x + x << std::endl; return 0; } diff --git a/exercises/02_function/main.cpp b/exercises/02_function/main.cpp index b5eef7f28..23879e45a 100644 --- a/exercises/02_function/main.cpp +++ b/exercises/02_function/main.cpp @@ -5,7 +5,7 @@ // NOTICE: 补充由内而外读法的机翻解释 // TODO: 在这里声明函数 - +int add(int a, int b); int main(int argc, char **argv) { ASSERT(add(123, 456) == 123 + 456, "add(123, 456) should be 123 + 456"); @@ -16,4 +16,5 @@ int main(int argc, char **argv) { int add(int a, int b) { // TODO: 补全函数定义，但不要移动代码行 + return a+b; } diff --git a/exercises/03_argument¶meter/main.cpp b/exercises/03_argument¶meter/main.cpp index 7fb5d3c2f..76136eae6 100644 --- a/exercises/03_argument¶meter/main.cpp +++ b/exercises/03_argument¶meter/main.cpp @@ -8,19 +8,19 @@ void func(int); // TODO: 为下列 ASSERT 填写正确的值 int main(int argc, char **argv) { auto arg = 99; - ASSERT(arg == ?, "arg should be ?"); + ASSERT(arg == 99, "arg should be ?"); std::cout << "befor func call: " << arg << std::endl; func(arg); - ASSERT(arg == ?, "arg should be ?"); + ASSERT(arg == 99, "arg should be ?"); std::cout << "after func call: " << arg << std::endl; return 0; } // TODO: 为下列 ASSERT 填写正确的值 void func(int param) { - ASSERT(param == ?, "param should be ?"); + ASSERT(param == 99, "param should be ?"); std::cout << "befor add: " << param << std::endl; param += 1; - ASSERT(param == ?, "param should be ?"); + ASSERT(param == 100, "param should be ?"); std::cout << "after add: " << param << std::endl; } diff --git a/exercises/04_static/main.cpp b/exercises/04_static/main.cpp index f107762fa..64f417694 100644 --- a/exercises/04_static/main.cpp +++ b/exercises/04_static/main.cpp @@ -10,10 +10,10 @@ static int func(int param) { int main(int argc, char **argv) { // TODO: 将下列 `?` 替换为正确的数字 - ASSERT(func(5) == ?, "static variable value incorrect"); - ASSERT(func(4) == ?, "static variable value incorrect"); - ASSERT(func(3) == ?, "static variable value incorrect"); - ASSERT(func(2) == ?, "static variable value incorrect"); - ASSERT(func(1) == ?, "static variable value incorrect"); + ASSERT(func(5) == 5, "static variable value incorrect"); + ASSERT(func(4) == 6, "static variable value incorrect"); + ASSERT(func(3) == 7, "static variable value incorrect"); + ASSERT(func(2) == 8, "static variable value incorrect"); + ASSERT(func(1) == 9, "static variable value incorrect"); return 0; } diff --git a/exercises/05_constexpr/main.cpp b/exercises/05_constexpr/main.cpp index d1db6c9d8..4b71e0ceb 100644 --- a/exercises/05_constexpr/main.cpp +++ b/exercises/05_constexpr/main.cpp @@ -12,7 +12,7 @@ constexpr unsigned long long fibonacci(int i) { } int main(int argc, char **argv) { - constexpr auto FIB20 = fibonacci(20); + auto FIB20 = fibonacci(20); ASSERT(FIB20 == 6765, "fibonacci(20) should be 6765"); std::cout << "fibonacci(20) = " << FIB20 << std::endl; diff --git a/exercises/06_array/main.cpp b/exercises/06_array/main.cpp index 61ed99ec0..33f483540 100644 --- a/exercises/06_array/main.cpp +++ b/exercises/06_array/main.cpp @@ -11,13 +11,13 @@ unsigned long long fibonacci(int i) { return 1; default: // TODO: 补全三目表达式缺失的部分 - return ? : (arr[i] = fibonacci(i - 1) + fibonacci(i - 2)); + return arr[i] != 0 ? arr[i] : (arr[i] = fibonacci(i - 1) + fibonacci(i - 2)); } } int main(int argc, char **argv) { // TODO: 为此 ASSERT 填写正确的值 - ASSERT(sizeof(arr) == ?, "sizeof array is size of all its elements"); + ASSERT(sizeof(arr) == 720, "sizeof array is size of all its elements"); // ---- 不要修改以下代码 ---- ASSERT(fibonacci(2) == 1, "fibonacci(2) should be 1"); ASSERT(fibonacci(20) == 6765, "fibonacci(20) should be 6765"); diff --git a/exercises/07_loop/main.cpp b/exercises/07_loop/main.cpp index 44fd835cd..fa042599e 100644 --- a/exercises/07_loop/main.cpp +++ b/exercises/07_loop/main.cpp @@ -5,9 +5,9 @@ // READ: 纯函数 static unsigned long long fibonacci(int i) { // TODO: 为缓存设置正确的初始值 - static unsigned long long cache[96], cached; + static unsigned long long cache[96]{0,1}, cached = 2; // TODO: 设置正确的循环条件 - for (; false; ++cached) { + for (; cached <= i; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; diff --git a/exercises/08_pointer/main.cpp b/exercises/08_pointer/main.cpp index ba37173f5..17cb8331b 100644 --- a/exercises/08_pointer/main.cpp +++ b/exercises/08_pointer/main.cpp @@ -5,6 +5,10 @@ bool is_fibonacci(int *ptr, int len, int stride) { ASSERT(len >= 3, "`len` should be at least 3"); // TODO: 编写代码判断从 ptr 开始，每 stride 个元素取 1 个元素，组成长度为 n 的数列是否满足 // arr[i + 2] = arr[i] + arr[i + 1] + int i = 0; + for(;i + 2 < len;i++){ + if(ptr[(i + 2)*stride] != ptr[i*stride] + ptr[(i + 1)*stride]) return false; + } return true; } diff --git a/exercises/09_enum&union/main.cpp b/exercises/09_enum&union/main.cpp index 3f2cec768..ead91762d 100644 --- a/exercises/09_enum&union/main.cpp +++ b/exercises/09_enum&union/main.cpp @@ -37,7 +37,7 @@ ColorEnum convert_by_pun(Color c) { TypePun pun; // TODO: 补全类型双关转换 - + pun.c = c; return pun.e; } diff --git a/exercises/10_trivial/main.cpp b/exercises/10_trivial/main.cpp index 6ba23e48e..1c8ecf4cd 100644 --- a/exercises/10_trivial/main.cpp +++ b/exercises/10_trivial/main.cpp @@ -9,8 +9,9 @@ struct FibonacciCache { // TODO: 实现正确的缓存优化斐波那契计算 static unsigned long long fibonacci(FibonacciCache &cache, int i) { - for (; false; ++cached) { - cache[cached] = cache[cached - 1] + cache[cached - 2]; + if(i <= cache.cached) return cache.cache[i]; + for (; cache.cached <= i ; cache.cached++) { + cache.cache[cache.cached] = cache.cache[cache.cached - 1] + cache.cache[cache.cached - 2]; } return cache.cache[i]; } @@ -20,6 +21,9 @@ int main(int argc, char **argv) { // NOTICE: C/C++ 中，读取未初始化的变量（包括结构体变量）是未定义行为 // READ: 初始化的各种写法 FibonacciCache fib; + fib.cache[0] = 0; + fib.cache[1] = 1; + fib.cached = 2; ASSERT(fibonacci(fib, 10) == 55, "fibonacci(10) should be 55"); std::cout << "fibonacci(10) = " << fibonacci(fib, 10) << std::endl; return 0; diff --git a/exercises/11_method/main.cpp b/exercises/11_method/main.cpp index 0e08e0a36..a5ae0738b 100644 --- a/exercises/11_method/main.cpp +++ b/exercises/11_method/main.cpp @@ -6,7 +6,7 @@ struct Fibonacci { // TODO: 实现正确的缓存优化斐波那契计算 unsigned long long get(int i) { - for (; false; ++cached) { + for (; cached <= i; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; @@ -16,6 +16,9 @@ struct Fibonacci { int main(int argc, char **argv) { // TODO: 初始化缓存结构体，使计算正确 Fibonacci fib; + fib.cache[0] = 0; + fib.cache[1] = 1; + fib.cached = 2; ASSERT(fib.get(10) == 55, "fibonacci(10) should be 55"); std::cout << "fibonacci(10) = " << fib.get(10) << std::endl; return 0; diff --git a/exercises/12_method_const/main.cpp b/exercises/12_method_const/main.cpp index 5521be4da..65ffe2bec 100644 --- a/exercises/12_method_const/main.cpp +++ b/exercises/12_method_const/main.cpp @@ -5,7 +5,8 @@ struct Fibonacci { int numbers[11]; // TODO: 修改方法签名和实现，使测试通过 - int get(int i) { + int get(int i) const { + return numbers[i]; } }; diff --git a/exercises/13_class/main.cpp b/exercises/13_class/main.cpp index 9afa98c5b..caa50dcee 100644 --- a/exercises/13_class/main.cpp +++ b/exercises/13_class/main.cpp @@ -15,13 +15,17 @@ class Fibonacci { public: // TODO: 实现构造器 // Fibonacci() - + Fibonacci(){ + this->cache[0] = 0; + this->cache[1] = 1; + this->cached = 2; + } // TODO: 实现正确的缓存优化斐波那契计算 size_t get(int i) { - for (; false; ++cached) { - cache[cached] = cache[cached - 1] + cache[cached - 2]; + for (; this->cached <= i; ++(this->cached)) { + this->cache[this->cached] = this->cache[this->cached - 1] + this->cache[this->cached - 2]; } - return cache[i]; + return this->cache[i]; } }; diff --git a/exercises/14_class_destruct/main.cpp b/exercises/14_class_destruct/main.cpp index 42150e8ca..9089ead07 100644 --- a/exercises/14_class_destruct/main.cpp +++ b/exercises/14_class_destruct/main.cpp @@ -11,17 +11,25 @@ class DynFibonacci { public: // TODO: 实现动态设置容量的构造器 - DynFibonacci(int capacity): cache(new ?), cached(?) {} + DynFibonacci(int capacity): cache(new size_t[capacity]), cached(capacity) { + cache[0] = 0; + cache[1] = 1; + for (int i = 2; i < capacity; ++i) { + cache[i] = cache[i - 1] + cache[i - 2]; + } + } // TODO: 实现析构器，释放缓存空间 - ~DynFibonacci(); + ~DynFibonacci(){ + delete[] cache; + } // TODO: 实现正确的缓存优化斐波那契计算 size_t get(int i) { - for (; false; ++cached) { - cache[cached] = cache[cached - 1] + cache[cached - 2]; + for (; this->cached <= i; ++this->cached) { + this->cache[this->cached] = this->cache[this->cached - 1] + this->cache[this->cached - 2]; } - return cache[i]; + return this->cache[i]; } }; diff --git a/exercises/15_class_clone/main.cpp b/exercises/15_class_clone/main.cpp index f74b70391..7f3d70f38 100644 --- a/exercises/15_class_clone/main.cpp +++ b/exercises/15_class_clone/main.cpp @@ -10,17 +10,29 @@ class DynFibonacci { public: // TODO: 实现动态设置容量的构造器 - DynFibonacci(int capacity): cache(new ?), cached(?) {} + DynFibonacci(int capacity): cache(new size_t[capacity]), cached(capacity) { + cache[0] = 0; + cache[1] = 1; + for (int i = 2; i < capacity; ++i) { + cache[i] = cache[i - 1] + cache[i - 2]; + } + } // TODO: 实现复制构造器 - DynFibonacci(DynFibonacci const &) = delete; + DynFibonacci(DynFibonacci const & others): cache(new size_t[others.cached]), cached(others.cached){ + for (int i = 0; i < cached; ++i) { + cache[i] = others.cache[i]; + } + }; // TODO: 实现析构器，释放缓存空间 - ~DynFibonacci(); + ~DynFibonacci(){ + delete[] cache; + } // TODO: 实现正确的缓存优化斐波那契计算 size_t get(int i) { - for (; false; ++cached) { + for (; cached <= i; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; diff --git a/exercises/16_class_move/main.cpp b/exercises/16_class_move/main.cpp index 8d2c421da..8222ff9b7 100644 --- a/exercises/16_class_move/main.cpp +++ b/exercises/16_class_move/main.cpp @@ -7,29 +7,46 @@ // READ: 移动构造函数 // READ: 移动赋值 -// READ: 运算符重载 - +// READ: 运算符重载 ) class DynFibonacci { size_t *cache; int cached; public: // TODO: 实现动态设置容量的构造器 - DynFibonacci(int capacity): cache(new ?), cached(?) {} + DynFibonacci(int capacity): cache(new size_t[capacity]), cached(capacity) { + cache[0] = 0; + cache[1] = 1; + for(int i = 2;i < capacity;i++) cache[i] = cache[i-1]+cache[i-2]; + } // TODO: 实现移动构造器 - DynFibonacci(DynFibonacci &&) noexcept = delete; + DynFibonacci(DynFibonacci && other) noexcept : cache(other.cache), cached(other.cached){ + other.cache = nullptr; + other.cached = 0; + }; // TODO: 实现移动赋值 // NOTICE: ⚠ 注意移动到自身问题 ⚠ - DynFibonacci &operator=(DynFibonacci &&) noexcept = delete; + DynFibonacci &operator=(DynFibonacci && other) noexcept { + if(this != &other){ + delete[] cache; + cache =other.cache; + cached = other.cached; + other.cache = nullptr; + other.cached = 0; + } + return *this; + } // TODO: 实现析构器，释放缓存空间 - ~DynFibonacci(); + ~DynFibonacci(){ + delete[] cache; + } // TODO: 实现正确的缓存优化斐波那契计算 size_t operator[](int i) { - for (; false; ++cached) { + for (; cached<=i; ++cached) { cache[cached] = cache[cached - 1] + cache[cached - 2]; } return cache[i]; diff --git a/exercises/17_class_derive/main.cpp b/exercises/17_class_derive/main.cpp index 819ae72fc..2648fa411 100644 --- a/exercises/17_class_derive/main.cpp +++ b/exercises/17_class_derive/main.cpp @@ -50,9 +50,9 @@ int main(int argc, char **argv) { B b = B(3); // TODO: 补全三个类型的大小 - static_assert(sizeof(X) == ?, "There is an int in X"); - static_assert(sizeof(A) == ?, "There is an int in A"); - static_assert(sizeof(B) == ?, "B is an A with an X"); + static_assert(sizeof(X) == 4, "There is an int in X"); + static_assert(sizeof(A) == 4, "There is an int in A"); + static_assert(sizeof(B) == 8, "B is an A with an X"); i = 0; std::cout << std::endl @@ -63,9 +63,9 @@ int main(int argc, char **argv) { // B ba = A(4); // 这也是不可能的，因为 A 是 B 的一部分，就好像不可以把套娃的外层放进内层里。 - A ab = B(5);// 然而这个代码可以编译和运行！ - // THINK: 观察打印出的信息，推测把大象放进冰箱分几步？ - // THINK: 这样的代码是“安全”的吗？ + A ab = B(5);// 然而这个代码可以编译和运行！因为这B是可以调用 A 的拷贝构造函数 + // THINK: 观察打印出的信息，推测把大象放进冰箱分几步？构造B，拿到A的部分，析构B，构造A。 + // THINK: 这样的代码是“安全”的吗？不安全，如果B重写了A的函数会出问题 // NOTICE: 真实场景中不太可能出现这样的代码 i = 0; diff --git a/exercises/18_class_virtual/main.cpp b/exercises/18_class_virtual/main.cpp index ac6382413..344709e4c 100644 --- a/exercises/18_class_virtual/main.cpp +++ b/exercises/18_class_virtual/main.cpp @@ -42,38 +42,38 @@ int main(int argc, char **argv) { C c; D d; - ASSERT(a.virtual_name() == '?', MSG); - ASSERT(b.virtual_name() == '?', MSG); - ASSERT(c.virtual_name() == '?', MSG); - ASSERT(d.virtual_name() == '?', MSG); - ASSERT(a.direct_name() == '?', MSG); - ASSERT(b.direct_name() == '?', MSG); - ASSERT(c.direct_name() == '?', MSG); - ASSERT(d.direct_name() == '?', MSG); + ASSERT(a.virtual_name() == 'A', MSG); + ASSERT(b.virtual_name() == 'B', MSG); + ASSERT(c.virtual_name() == 'C', MSG); + ASSERT(d.virtual_name() == 'C', MSG); + ASSERT(a.direct_name() == 'A', MSG); + ASSERT(b.direct_name() == 'B', MSG); + ASSERT(c.direct_name() == 'C', MSG); + ASSERT(d.direct_name() == 'D', MSG); A &rab = b; B &rbc = c; C &rcd = d; - ASSERT(rab.virtual_name() == '?', MSG); - ASSERT(rbc.virtual_name() == '?', MSG); - ASSERT(rcd.virtual_name() == '?', MSG); - ASSERT(rab.direct_name() == '?', MSG); - ASSERT(rbc.direct_name() == '?', MSG); - ASSERT(rcd.direct_name() == '?', MSG); + ASSERT(rab.virtual_name() == 'B', MSG); + ASSERT(rbc.virtual_name() == 'C', MSG); + ASSERT(rcd.virtual_name() == 'C', MSG); + ASSERT(rab.direct_name() == 'A', MSG); + ASSERT(rbc.direct_name() == 'B', MSG); + ASSERT(rcd.direct_name() == 'C', MSG); A &rac = c; B &rbd = d; - ASSERT(rac.virtual_name() == '?', MSG); - ASSERT(rbd.virtual_name() == '?', MSG); - ASSERT(rac.direct_name() == '?', MSG); - ASSERT(rbd.direct_name() == '?', MSG); + ASSERT(rac.virtual_name() == 'C', MSG); + ASSERT(rbd.virtual_name() == 'C', MSG); + ASSERT(rac.direct_name() == 'A', MSG); + ASSERT(rbd.direct_name() == 'B', MSG); A &rad = d; - ASSERT(rad.virtual_name() == '?', MSG); - ASSERT(rad.direct_name() == '?', MSG); + ASSERT(rad.virtual_name() == 'C', MSG); + ASSERT(rad.direct_name() == 'A', MSG); return 0; } diff --git a/exercises/19_class_virtual_destruct/main.cpp b/exercises/19_class_virtual_destruct/main.cpp index cdd54f74f..26d974b3a 100644 --- a/exercises/19_class_virtual_destruct/main.cpp +++ b/exercises/19_class_virtual_destruct/main.cpp @@ -5,12 +5,12 @@ struct A { // TODO: 正确初始化静态字段 - static int num_a = 0; + static int num_a; A() { ++num_a; } - ~A() { + virtual ~A() { --num_a; } @@ -18,9 +18,10 @@ struct A { return 'A'; } }; +int A::num_a = 0; struct B final : public A { // TODO: 正确初始化静态字段 - static int num_b = 0; + static int num_b; B() { ++num_b; @@ -33,14 +34,14 @@ struct B final : public A { return 'B'; } }; - +int B::num_b = 0; int main(int argc, char **argv) { auto a = new A; auto b = new B; - ASSERT(A::num_a == ?, "Fill in the correct value for A::num_a"); - ASSERT(B::num_b == ?, "Fill in the correct value for B::num_b"); - ASSERT(a->name() == '?', "Fill in the correct value for a->name()"); - ASSERT(b->name() == '?', "Fill in the correct value for b->name()"); + ASSERT(A::num_a == 2, "Fill in the correct value for A::num_a"); + ASSERT(B::num_b == 1, "Fill in the correct value for B::num_b"); + ASSERT(a->name() == 'A', "Fill in the correct value for a->name()"); + ASSERT(b->name() == 'B', "Fill in the correct value for b->name()"); delete a; delete b; @@ -48,13 +49,14 @@ int main(int argc, char **argv) { ASSERT(B::num_b == 0, "Every B was destroyed"); A *ab = new B;// 派生类指针可以随意转换为基类指针 - ASSERT(A::num_a == ?, "Fill in the correct value for A::num_a"); - ASSERT(B::num_b == ?, "Fill in the correct value for B::num_b"); - ASSERT(ab->name() == '?', "Fill in the correct value for ab->name()"); + ASSERT(A::num_a == 1, "Fill in the correct value for A::num_a"); + ASSERT(B::num_b == 1, "Fill in the correct value for B::num_b"); + ASSERT(ab->name() == 'B', "Fill in the correct value for ab->name()"); // TODO: 基类指针无法随意转换为派生类指针，补全正确的转换语句 - B &bb = *ab; - ASSERT(bb.name() == '?', "Fill in the correct value for bb->name()"); + B* pB = static_cast(ab); + B &bb = *pB; + ASSERT(bb.name() == 'B', "Fill in the correct value for bb->name()"); // TODO: ---- 以下代码不要修改，通过改正类定义解决编译问题 ---- delete ab;// 通过指针可以删除指向的对象，即使是多态对象 diff --git a/exercises/20_function_template/main.cpp b/exercises/20_function_template/main.cpp index cb6d978d3..59bd5ba3b 100644 --- a/exercises/20_function_template/main.cpp +++ b/exercises/20_function_template/main.cpp @@ -2,7 +2,8 @@ // READ: 函数模板 // TODO: 将这个函数模板化 -int plus(int a, int b) { +template +T plus(T a, T b) { return a + b; } @@ -10,11 +11,11 @@ int main(int argc, char **argv) { ASSERT(plus(1, 2) == 3, "Plus two int"); ASSERT(plus(1u, 2u) == 3u, "Plus two unsigned int"); - // THINK: 浮点数何时可以判断 ==？何时必须判断差值？ + // THINK: 浮点数何时可以判断 ==？何时必须判断差值？检查特殊值的时候可以用，浮点误差的问题需要判断差值 ASSERT(plus(1.25f, 2.5f) == 3.75f, "Plus two float"); ASSERT(plus(1.25, 2.5) == 3.75, "Plus two double"); // TODO: 修改判断条件使测试通过 - ASSERT(plus(0.1, 0.2) == 0.3, "How to make this pass?"); + ASSERT(std::abs(plus(0.1, 0.2) - 0.3)<= 0.0001, "How to make this pass?"); return 0; } diff --git a/exercises/21_runtime_datatype/main.cpp b/exercises/21_runtime_datatype/main.cpp index 9c4bf376a..950595fdb 100644 --- a/exercises/21_runtime_datatype/main.cpp +++ b/exercises/21_runtime_datatype/main.cpp @@ -18,13 +18,22 @@ struct TaggedUnion { }; // TODO: 将这个函数模板化用于 sigmoid_dyn -float sigmoid(float x) { +template +T sigmoid(T x) { return 1 / (1 + std::exp(-x)); } TaggedUnion sigmoid_dyn(TaggedUnion x) { TaggedUnion ans{x.type}; // TODO: 根据 type 调用 sigmoid + switch (x.type) { + case DataType::Float: + ans.f = sigmoid(x.f); + break; + case DataType::Double: + ans.d = sigmoid(x.d); + break; + } return ans; } diff --git a/exercises/22_class_template/main.cpp b/exercises/22_class_template/main.cpp index d4985d904..13e96fbb6 100644 --- a/exercises/22_class_template/main.cpp +++ b/exercises/22_class_template/main.cpp @@ -10,6 +10,10 @@ struct Tensor4D { Tensor4D(unsigned int const shape_[4], T const *data_) { unsigned int size = 1; // TODO: 填入正确的 shape 并计算 size + for(int i = 0;i < 4;i++){ + shape[i] = shape_[i]; + size *= shape[i]; + } data = new T[size]; std::memcpy(data, data_, size * sizeof(T)); } @@ -28,6 +32,38 @@ struct Tensor4D { // 则 `this` 与 `others` 相加时，3 个形状为 `[1, 2, 1, 4]` 的子张量各自与 `others` 对应项相加。 Tensor4D &operator+=(Tensor4D const &others) { // TODO: 实现单向广播的加法 + unsigned int total_elements = 1; + for (int i = 0; i < 4; ++i) { + total_elements *= shape[i]; + } + + unsigned int other_total_elements = 1; + for (int i = 0; i < 4; ++i) { + other_total_elements *= others.shape[i]; + } + + for (unsigned int i = 0; i < total_elements; ++i) { + unsigned int idx = i; + unsigned int coords[4]; + + for (int dim = 3; dim >= 0; --dim) { + coords[dim] = idx % shape[dim]; + idx /= shape[dim]; + } + + unsigned int other_idx = 0; + unsigned int stride = 1; + + for (int dim = 3; dim >= 0; --dim) { + unsigned int other_coord = (others.shape[dim] == 1) ? 0 : coords[dim]; + other_idx += other_coord * stride; + stride *= others.shape[dim]; + } + + if (other_idx < other_total_elements) { + data[i] += others.data[other_idx]; + } + } return *this; } }; diff --git a/exercises/23_template_const/main.cpp b/exercises/23_template_const/main.cpp index e0105e168..5dc1555ca 100644 --- a/exercises/23_template_const/main.cpp +++ b/exercises/23_template_const/main.cpp @@ -11,6 +11,10 @@ struct Tensor { Tensor(unsigned int const shape_[N]) { unsigned int size = 1; // TODO: 填入正确的 shape 并计算 size + for(int i = 0;i < N;i++){ + shape[i] = shape_[i]; + size *= shape_[i]; + } data = new T[size]; std::memset(data, 0, size * sizeof(T)); } @@ -35,6 +39,7 @@ struct Tensor { for (unsigned int i = 0; i < N; ++i) { ASSERT(indices[i] < shape[i], "Invalid index"); // TODO: 计算 index + index = index * shape[i] + indices[i]; } return index; } diff --git a/exercises/24_std_array/main.cpp b/exercises/24_std_array/main.cpp index c29718d9d..1c99d7f5e 100644 --- a/exercises/24_std_array/main.cpp +++ b/exercises/24_std_array/main.cpp @@ -8,21 +8,21 @@ int main(int argc, char **argv) { { std::array arr{{1, 2, 3, 4, 5}}; - ASSERT(arr.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(arr) == ?, "Fill in the correct value."); + ASSERT(arr.size() == 5, "Fill in the correct value."); + ASSERT(sizeof(arr) == 20, "Fill in the correct value."); int ans[]{1, 2, 3, 4, 5}; - ASSERT(std::memcmp(arr.?, ans, ?) == 0, "Fill in the correct values."); + ASSERT(std::memcmp(arr.data(), ans, 20) == 0, "Fill in the correct values."); } { std::array arr; - ASSERT(arr.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(arr) == ?, "Fill in the correct value."); + ASSERT(arr.size() == 8, "Fill in the correct value."); + ASSERT(sizeof(arr) == 64, "Fill in the correct value."); } { std::array arr{"Hello, InfiniTensor!"}; - ASSERT(arr.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(arr) == ?, "Fill in the correct value."); - ASSERT(std::strcmp(arr.?, "Hello, InfiniTensor!") == 0, "Fill in the correct value."); + ASSERT(arr.size() == 21, "Fill in the correct value."); + ASSERT(sizeof(arr) == 21, "Fill in the correct value."); + ASSERT(std::strcmp(arr.data(), "Hello, InfiniTensor!") == 0, "Fill in the correct value."); } return 0; } diff --git a/exercises/25_std_vector/main.cpp b/exercises/25_std_vector/main.cpp index f9e41bb78..886f17468 100644 --- a/exercises/25_std_vector/main.cpp +++ b/exercises/25_std_vector/main.cpp @@ -8,81 +8,81 @@ int main(int argc, char **argv) { { std::vector vec{1, 2, 3, 4, 5}; - ASSERT(vec.size() == ?, "Fill in the correct value."); - // THINK: `std::vector` 的大小是什么意思？与什么有关？ - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(vec.size() == 5, "Fill in the correct value."); + // THINK: `std::vector` 的大小是什么意思？与什么有关？大小是容器内的元素数量，和元素数量有关。 + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); int ans[]{1, 2, 3, 4, 5}; - ASSERT(std::memcmp(vec.?, ans, sizeof(ans)) == 0, "Fill in the correct values."); + ASSERT(std::memcmp(vec.data(), ans, sizeof(ans)) == 0, "Fill in the correct values."); } { std::vector vec{1, 2, 3, 4, 5}; { - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(vec.size() == 5, "Fill in the correct value."); + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); double ans[]{1, 2, 3, 4, 5}; - ASSERT(std::memcmp(vec.?, ans, sizeof(ans)) == 0, "Fill in the correct values."); + ASSERT(std::memcmp(vec.data(), ans, sizeof(ans)) == 0, "Fill in the correct values."); } { vec.push_back(6); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(vec.size() == 6, "Fill in the correct value."); + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); vec.pop_back(); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(vec.size() == 5, "Fill in the correct value."); + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); } { vec[4] = 6; - ASSERT(vec[0] == ?, "Fill in the correct value."); - ASSERT(vec[1] == ?, "Fill in the correct value."); - ASSERT(vec[2] == ?, "Fill in the correct value."); - ASSERT(vec[3] == ?, "Fill in the correct value."); - ASSERT(vec[4] == ?, "Fill in the correct value."); + ASSERT(vec[0] == 1, "Fill in the correct value."); + ASSERT(vec[1] == 2, "Fill in the correct value."); + ASSERT(vec[2] == 3, "Fill in the correct value."); + ASSERT(vec[3] == 4, "Fill in the correct value."); + ASSERT(vec[4] == 6, "Fill in the correct value."); } { - // THINK: `std::vector` 插入删除的时间复杂度是什么？ - vec.insert(?, 1.5); + // THINK: `std::vector` 插入删除的时间复杂度是什么？push_back和pusn_pop是O(1)，随机是O(n) + vec.insert(vec.begin()+1, 1.5); ASSERT((vec == std::vector{1, 1.5, 2, 3, 4, 6}), "Make this assertion pass."); - vec.erase(?); + vec.erase(vec.begin()+3); ASSERT((vec == std::vector{1, 1.5, 2, 4, 6}), "Make this assertion pass."); } { vec.shrink_to_fit(); - ASSERT(vec.capacity() == ?, "Fill in the correct value."); + ASSERT(vec.capacity() == 5, "Fill in the correct value."); vec.clear(); ASSERT(vec.empty(), "`vec` is empty now."); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(vec.capacity() == ?, "Fill in the correct value."); + ASSERT(vec.size() == 0, "Fill in the correct value."); + ASSERT(vec.capacity() == 5, "Fill in the correct value."); } } { - std::vector vec(?, ?); // TODO: 调用正确的构造函数 + std::vector vec(48, 'z'); // TODO: 调用正确的构造函数 ASSERT(vec[0] == 'z', "Make this assertion pass."); ASSERT(vec[47] == 'z', "Make this assertion pass."); ASSERT(vec.size() == 48, "Make this assertion pass."); - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(sizeof(vec) == 24, "Fill in the correct value."); { auto capacity = vec.capacity(); vec.resize(16); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(vec.capacity() == ?, "Fill in a correct identifier."); + ASSERT(vec.size() == 16, "Fill in the correct value."); + ASSERT(vec.capacity() == 48, "Fill in a correct identifier."); } { vec.reserve(256); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(vec.capacity() == ?, "Fill in the correct value."); + ASSERT(vec.size() == 16, "Fill in the correct value."); + ASSERT(vec.capacity() == 256, "Fill in the correct value."); } { vec.push_back('a'); vec.push_back('b'); vec.push_back('c'); vec.push_back('d'); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(vec.capacity() == ?, "Fill in the correct value."); - ASSERT(vec[15] == ?, "Fill in the correct value."); - ASSERT(vec[?] == 'a', "Fill in the correct value."); - ASSERT(vec[?] == 'b', "Fill in the correct value."); - ASSERT(vec[?] == 'c', "Fill in the correct value."); - ASSERT(vec[?] == 'd', "Fill in the correct value."); + ASSERT(vec.size() == 20, "Fill in the correct value."); + ASSERT(vec.capacity() == 256, "Fill in the correct value."); + ASSERT(vec[15] == 'z', "Fill in the correct value."); + ASSERT(vec[16] == 'a', "Fill in the correct value."); + ASSERT(vec[17] == 'b', "Fill in the correct value."); + ASSERT(vec[18] == 'c', "Fill in the correct value."); + ASSERT(vec[19] == 'd', "Fill in the correct value."); } } diff --git a/exercises/26_std_vector_bool/main.cpp b/exercises/26_std_vector_bool/main.cpp index b4ab4f9c4..155cf35e9 100644 --- a/exercises/26_std_vector_bool/main.cpp +++ b/exercises/26_std_vector_bool/main.cpp @@ -6,29 +6,29 @@ // TODO: 将下列 `?` 替换为正确的代码 int main(int argc, char **argv) { - std::vector vec(?, ?);// TODO: 正确调用构造函数 + std::vector vec(100, true);// TODO: 正确调用构造函数 ASSERT(vec[0], "Make this assertion pass."); ASSERT(vec[99], "Make this assertion pass."); ASSERT(vec.size() == 100, "Make this assertion pass."); // NOTICE: 平台相关！注意 CI:Ubuntu 上的值。 std::cout << "sizeof(std::vector) = " << sizeof(std::vector) << std::endl; - ASSERT(sizeof(vec) == ?, "Fill in the correct value."); + ASSERT(sizeof(vec) == 40, "Fill in the correct value."); { vec[20] = false; - ASSERT(?vec[20], "Fill in `vec[20]` or `!vec[20]`."); + ASSERT(!vec[20], "Fill in `vec[20]` or `!vec[20]`."); } { vec.push_back(false); - ASSERT(vec.size() == ?, "Fill in the correct value."); - ASSERT(?vec[100], "Fill in `vec[100]` or `!vec[100]`."); + ASSERT(vec.size() == 101, "Fill in the correct value."); + ASSERT(!vec[100], "Fill in `vec[100]` or `!vec[100]`."); } { auto ref = vec[30]; - ASSERT(?ref, "Fill in `ref` or `!ref`"); + ASSERT(ref, "Fill in `ref` or `!ref`"); ref = false; - ASSERT(?ref, "Fill in `ref` or `!ref`"); - // THINK: WHAT and WHY? - ASSERT(?vec[30], "Fill in `vec[30]` or `!vec[30]`."); + ASSERT(!ref, "Fill in `ref` or `!ref`"); + // THINK: WHAT and WHY? 因为拿到的是指针 + ASSERT(!vec[30], "Fill in `vec[30]` or `!vec[30]`."); } return 0; } diff --git a/exercises/27_strides/main.cpp b/exercises/27_strides/main.cpp index baceaf2a9..461d5714c 100644 --- a/exercises/27_strides/main.cpp +++ b/exercises/27_strides/main.cpp @@ -18,6 +18,11 @@ std::vector strides(std::vector const &shape) { // TODO: 完成函数体，根据张量形状计算张量连续存储时的步长。 // READ: 逆向迭代器 std::vector::rbegin // 使用逆向迭代器可能可以简化代码 + udim stride = 1; + for(int i = shape.size()-1;i >= 0;i--){ + strides[i] = stride; + stride *= shape[i]; + } return strides; } diff --git a/exercises/28_std_string/main.cpp b/exercises/28_std_string/main.cpp index d8b276274..5fcfdf31d 100644 --- a/exercises/28_std_string/main.cpp +++ b/exercises/28_std_string/main.cpp @@ -10,9 +10,9 @@ int main(int argc, char **argv) { auto world = "world"; // READ: `decltype` 表达式 // READ: `std::is_same_v` 元编程判别 - ASSERT((std::is_same_v), "Fill in the missing type."); - ASSERT((std::is_same_v), "Fill in the missing type."); + ASSERT((std::is_same_v), "Fill in the missing type."); + ASSERT((std::is_same_v), "Fill in the missing type."); // TODO: 将 `?` 替换为正确的字符串 - ASSERT(hello + ", " + world + '!' == "?", "Fill in the missing string."); + ASSERT(hello + ", " + world + '!' == "Hello, world!", "Fill in the missing string."); return 0; } diff --git a/exercises/29_std_map/main.cpp b/exercises/29_std_map/main.cpp index fcccca347..68122a5fc 100644 --- a/exercises/29_std_map/main.cpp +++ b/exercises/29_std_map/main.cpp @@ -7,11 +7,13 @@ template bool key_exists(std::map const &map, k const &key) { // TODO: 实现函数 + return map.find(key) != map.end(); } template void set(std::map &map, k key, v value) { // TODO: 实现函数 + map[key] = value; } // ---- 不要修改以下代码 ---- diff --git a/exercises/30_std_unique_ptr/main.cpp b/exercises/30_std_unique_ptr/main.cpp index 9b98b5794..2d6d9e769 100644 --- a/exercises/30_std_unique_ptr/main.cpp +++ b/exercises/30_std_unique_ptr/main.cpp @@ -48,13 +48,12 @@ int main(int argc, char **argv) { problems[2] = std::move(RECORDS); // ---- 不要修改以上代码 ---- - std::vector answers[]{ {"fd"}, // TODO: 分析 problems[1] 中资源的生命周期，将记录填入 `std::vector` // NOTICE: 此题结果依赖对象析构逻辑，平台相关，提交时以 CI 实际运行平台为准 - {"", "", "", "", "", "", "", ""}, - {"", "", "", "", "", "", "", ""}, + {"d", "ffr"}, + {"d", "d", "r"}, }; // ---- 不要修改以下代码 ---- diff --git a/exercises/31_std_shared_ptr/main.cpp b/exercises/31_std_shared_ptr/main.cpp index febbbcc6f..d35134457 100644 --- a/exercises/31_std_shared_ptr/main.cpp +++ b/exercises/31_std_shared_ptr/main.cpp @@ -10,36 +10,36 @@ int main(int argc, char **argv) { std::shared_ptr ptrs[]{shared, shared, shared}; std::weak_ptr observer = shared; - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 4, ""); ptrs[0].reset(); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 3, ""); ptrs[1] = nullptr; - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 2, ""); ptrs[2] = std::make_shared(*shared); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 1, ""); ptrs[0] = shared; ptrs[1] = shared; ptrs[2] = std::move(shared); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 3, ""); std::ignore = std::move(ptrs[0]); ptrs[1] = std::move(ptrs[1]); ptrs[1] = std::move(ptrs[2]); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 2, ""); shared = observer.lock(); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 3, ""); shared = nullptr; for (auto &ptr : ptrs) ptr = nullptr; - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 0, ""); shared = observer.lock(); - ASSERT(observer.use_count() == ?, ""); + ASSERT(observer.use_count() == 0, ""); return 0; } diff --git a/exercises/32_std_transform/main.cpp b/exercises/32_std_transform/main.cpp index f4dc25a5c..bdb60ca00 100644 --- a/exercises/32_std_transform/main.cpp +++ b/exercises/32_std_transform/main.cpp @@ -10,6 +10,8 @@ int main(int argc, char **argv) { std::vector val{8, 13, 21, 34, 55}; // TODO: 调用 `std::transform`，将 `v` 中的每个元素乘以 2，并转换为字符串，存入 `ans` // std::vector ans + std::vector ans; + std::transform(val.begin(),val.end(),std::back_inserter(ans),[](int x){return std::to_string(x*2);}); ASSERT(ans.size() == val.size(), "ans size should be equal to val size"); ASSERT(ans[0] == "16", "ans[0] should be 16"); ASSERT(ans[1] == "26", "ans[1] should be 26"); diff --git a/exercises/33_std_accumulate/main.cpp b/exercises/33_std_accumulate/main.cpp index 6326929d5..52718e91c 100644 --- a/exercises/33_std_accumulate/main.cpp +++ b/exercises/33_std_accumulate/main.cpp @@ -10,8 +10,8 @@ int main(int argc, char **argv) { // - 数据类型为 float； // - 形状为 shape； // - 连续存储； - // 的张量占用的字节数 - // int size = + // 的张量占用的字节数 + int size = std::accumulate(std::begin(shape),std::end(shape),sizeof(DataType),std::multiplies()); ASSERT(size == 602112, "4x1x3x224x224 = 602112"); return 0; } diff --git a/xmake.lua b/xmake.lua index fa3263bd3..f0eabe5cd 100644 --- a/xmake.lua +++ b/xmake.lua @@ -12,8 +12,8 @@ target("learn") set_kind("binary") add_deps("test") add_files("learn/learn.cpp") - target("summary") set_kind("binary") - add_deps("test") add_files("learn/summary.cpp") + add_deps("test") + add_links("pthread")