Changed my README file

CaesarCipher/CaesarCipher/main.m

@@ -8,11 +8,25 @@
 
 #import <Foundation/Foundation.h>
 
+/*The Roman General Julius Caesar used to correspond with his generals using a secret code. He devised a way of encrypting his messages using a simple encryption scheme now known as Caesar Cipher or Shift Cipher. You can read more about it here and watch a video here
+
+ You are given a class called CaesarCipher with methods encode and decode
+ Being amateur codebreakers, we want to know if two distinct looking ciphers correspond to the same input message. Write a method called codeBreaker, which accepts two cipher strings as paramaters and returns a boolean value which tells us whether they are actually the same input message encoded using two different offsets. hint: the maximum offset is 25
+ There are multiple ways to do this. Try to come up with as many solutions as you can.
+ Example:
+ okmg = "mike", offset 2
+ tprl = "mike", offset 7
+
+ Both are the same input message, but different offset. Your method would return YES in this case
+ */
+
 @interface CaesarCipher : NSObject
 
 - (NSString *)encode:(NSString *)string offset:(int)offset;
 - (NSString *)decode:(NSString *)string offset:(int)offset;
 
+- (BOOL)codeBreakerCipher:(NSString *)cipher1 AndOtherCipher:(NSString *)cipher2;
+
 @end
 
 
@@ -29,7 +43,7 @@ - (NSString *)encode:(NSString *)string offset:(int)offset {
     [str getCharacters:buffer range:NSMakeRange(0, count)];
 
     char allchars[] = "abcdefghijklmnopqrstuvwxyz";
-
+    
     for (int i = 0; i < count; i++) {
         if (buffer[i] == ' ' || ispunct(buffer[i])) {
             result[i] = buffer[i];
@@ -39,22 +53,89 @@ - (NSString *)encode:(NSString *)string offset:(int)offset {
         char *e = strchr(allchars, buffer[i]);
         int idx= (int)(e - allchars);
         int new_idx = (idx + offset) % strlen(allchars);
-
+        
         result[i] = allchars[new_idx];
     }
-
+    
     return [NSString stringWithCharacters:result length:count];
 }
 
 - (NSString *)decode:(NSString *)string offset:(int)offset {
     return [self encode:string offset: (26 - offset)];
 }
 
+- (BOOL)codeBreakerCipher:(NSString *)cipher1string AndOtherCipher:(NSString *)cipher2string{
+
+    CaesarCipher *cipher = [[CaesarCipher alloc] init];
+
+    //create an array of all the 26 possible decoded ciphers for cipher 1
+    NSMutableSet *decodedCipher1array = [[NSMutableSet alloc] init]; //sets used to allow for intersectsSetFunction
+    for (int i = 1; i < 26; i++) {
+        [decodedCipher1array addObject:[cipher decode:cipher1string offset:i]];
+    }
+
+    //create an array of all the 26 possible decoded ciphers for cipher 2
+    NSMutableSet *decodedCipher2array = [[NSMutableSet alloc] init];
+    for (int i = 1; i < 26; i++) {
+        [decodedCipher2array addObject:[cipher decode:cipher2string offset:i]];
+    }
+
+    //check if the two decoded arrays have a common element
+    if ([decodedCipher1array intersectsSet:decodedCipher2array]){
+        return YES;
+    }
+    else {
+        return NO;
+    }
+}
+
 @end
 
 
 int main(int argc, const char * argv[]) {
     @autoreleasepool {
+
+        NSString *word1 = @"yellow";
+        NSString *word2 = @"yellow";
+
+        //encoding cipher 1
+        CaesarCipher *cipher1 = [[CaesarCipher alloc] init];
+        NSLog(@"Word 1: %@",word1);
+        NSString *encodedCipher1 = [cipher1 encode:word1 offset:4];
+        NSLog(@"Cipher 1 encoded: %@",encodedCipher1);
+
+        //encoding cipher 2
+        CaesarCipher *cipher2 = [[CaesarCipher alloc] init];
+        NSLog(@"Word 2: %@",word2);
+        NSString *encodedCipher2 = [cipher2 encode:word2 offset:17];
+        NSLog(@"Cipher 2 encoded: %@",encodedCipher2);
+
+        BOOL C4Q =  [cipher1 codeBreakerCipher:encodedCipher1 AndOtherCipher:encodedCipher2];
+        if (C4Q) {
+            NSLog(@"The input messages are the same!");
+        }
+        else {
+            NSLog(@"The input messages are NOT THE SAME.");
+        }
+
+        //        CaesarCipher *myCipher = [[CaesarCipher alloc] init];
+        //
+        //        //encodes cipher
+        //        NSString *encodedCipher = [myCipher encode:@"Yes" offset:3];
+        //        NSLog(@"%@",encodedCipher);
+        //
+        //        //decodes cipher
+        //         NSString *decodedCipher = [myCipher decode:encodedCipher offset:3];
+        //         NSLog(@"%@",decodedCipher);
+        //
+        //
+        //        //decoding cipher 1
+        //        NSString *decodedCipher1 = [cipher1 decode:encodedCipher1 offset:5];
+        //        NSLog(@"Cipher 1 decoded: %@",decodedCipher1);
+        //
+        //        //decoding cipher 2
+        //        NSString *decodedCipher2 = [cipher2 decode:encodedCipher2 offset:5];
+        //        NSLog(@"Cipher 2 decoded: %@",decodedCipher2);
 
     }
 }

Election/Election/main.m

@@ -8,6 +8,33 @@
 
 #import <Foundation/Foundation.h>
 
+
+/*3. BONUS : Voting System
+
+ You are given 3 classes
+
+ ElectionManager
+ Conducts an election.
+ Controls start of voting
+
+ Election
+ Maintains a list of contenders
+
+ Contender
+ Represents details about a contender
+ What is the contender's name?
+ How many votes has he received?
+
+ Write a program to simulate an election. Create a class called VotingSimulator. In the main , you are required to do the following:
+
+ Create an Election object, and given the Election a name
+ Create a few Contender objects. Add these to the Election object. Make sure that the contender names are distinct!
+ Create a ElectionManager object. Ask it to manage the Election object created above.
+ Ask the ElectionManager to initiatePolling
+ Follow the instructions on the console. After each round of polling you will be asked(within the console) whether you want to continue or not.
+ Ask the ElectionManager to displayResults
+ */
+
 // forward declarations
 @class Contender;
 @class Election;
@@ -17,9 +44,9 @@ @interface Contender : NSObject
 
 - (instancetype)initWithName:(NSString *)name;
 
-- (void)addVote;
-- (NSInteger)votesReceived;
-- (NSString *)name;
+- (void)addVote; //setter
+- (NSInteger)votesReceived; //getter
+- (NSString *)name; //getter
 
 @end
 
@@ -201,11 +228,49 @@ - (BOOL)pollsOpen {
 
 @end
 
+// VotingSimulator class
 
+//@interface VotingSimulator
+//
+//@end
+//
+//@implementation VotingSimulator
+//
+//<#methods#>
+//
+//@end
 
 int main(int argc, const char * argv[]) {
     @autoreleasepool {
 
+        // 1. Create an Election object, and give the Election a name.
+        Election *knittingClubElection2015 = [[Election alloc] initWithElectionName:@"Knitting Club Election 2015"];
+
+        // 2. Create a few Contender objects. Add these to the Election object. Make sure that the contender names are distinct!
+        Contender *mariah = [[Contender alloc] initWithName:@"Mariah"];
+        [knittingClubElection2015 addContender:mariah];
+
+        Contender *lauren = [[Contender alloc] initWithName:@"Lauren"];
+        [knittingClubElection2015 addContender:lauren];
+
+        Contender *anna = [[Contender alloc] initWithName:@"Anna"];
+        [knittingClubElection2015 addContender:anna];
+
+        [knittingClubElection2015 displayCandidates];
+
+        // 3. Create a ElectionManager object. Ask it to manage the Election object created above.
+        ElectionManager *knittingClubManager = [[ElectionManager alloc] init];
+        [knittingClubManager manage:knittingClubElection2015];
+
+        // 4. Ask the ElectionManager to initiatePolling
+        [knittingClubManager initiatePolling];
+
+        // 5. Follow the instructions on the console. After each round of polling you will be asked(within the console) whether you want to continue or not.
+
+        // 6. Ask the ElectionManager to displayResults
+        [knittingClubManager displayResults];
+
+
     }
     return 0;
 }