test: Positive tests, remove old examples

Author: IB004

examples/basic.fc

@@ -46,7 +46,6 @@ void print_arr(string s, int len) {
     i = i + 1;
   }
   write(10);
-  exit(0);
 }
 
 void main() {

examples/cond_test.fc

@@ -0,0 +1,18 @@
+// test: call_copy_arguments
+// input:  "a"
+// output: "a"
+
+int write(int _);
+void exit(int _);
+
+int foo(int arg){
+    arg = 0;
+    return arg;
+}
+
+void main(){
+    int a = 97;
+    foo(a);
+    write(a);
+    exit(0);
+}

examples/decl.fc

@@ -0,0 +1,19 @@
+// test: variable-shadowing
+// input: ""
+// output: "abcda"
+
+int write(int _);
+void exit(int _);
+
+void main(){
+    int a = 97;
+    write(a);
+    int i = 0;
+    while (i < 3){
+        int a = 98 + i;
+        write(a);
+        i = i + 1;
+    }
+    write(a);
+    exit(0);
+}

examples/sort.fc

@@ -0,0 +1,84 @@
+// test: sort-test
+// input: "1\n"             "153462\n"
+// output: "1 \n1 \n1 \n"   "1 2 3 4 5 6 \n6 5 4 3 2 1 \n1 3 5 2 4 6 \n"
+
+  /* Returns:
+  string s = "153462798";
+  1 2 3 4 5 6 7 8 9 
+  9 8 7 6 5 4 3 2 1 
+  1 3 5 7 9 2 4 6 8 
+  */
+
+int write(int _);
+int read();
+void exit(int _);
+
+
+int cstrlen(string s);
+void write_str(string s, int len);
+int itoascii(int n);
+void write_int(int n);
+bool is_digit(int n);
+int read_int();
+void write_int(int n);
+
+int regular_compare(int a, int b) { return a - b; }
+
+int reverse_compare(int a, int b) { return b - a; }
+
+int even_are_bigger_compare(int a, int b) {
+  if (a % 2 == 0 && b % 2 != 0)
+    return 1;
+  if (a % 2 != 0 && b % 2 == 0)
+    return -1;
+  return a - b;
+}
+
+void insertion_sort(string arr, int n, (int - int - int)compare) {
+  int i = 1;
+  while (i < n) {
+    int cur = arr[i];
+    int j = i - 1;
+
+    while ((j > 0 || j == 0) && (compare(arr[j], cur) > 0)) {
+      arr[j + 1] = arr[j];
+      j = j - 1;
+    }
+    arr[j + 1] = cur;
+    i = i + 1;
+  }
+}
+
+void print_arr(string s, int len) {
+  int i = 0;
+  while (i < len) {
+    write(s[i]);
+    write(32);
+    i = i + 1;
+  }
+  write(10);
+}
+
+void main() {
+  string s = "0123456789";
+
+  int num = 0;
+  int len = 0;
+  int max_len = cstrlen(s);
+  while(len < max_len  && num != 10){
+    num = read();
+    s[len] = num;
+    len = len + 1;
+  }
+  s[len] = 0;
+  len = len - 1;
+
+  insertion_sort(s, len, regular_compare);
+  print_arr(s, len);
+  insertion_sort(s, len, reverse_compare);
+  print_arr(s, len);
+  insertion_sort(s, len, even_are_bigger_compare);
+  print_arr(s, len);
+  exit(0);
+
+}