Question

I just recently started learning Objective C, when i run the next program i get error
“program received signal: “EXC_BAD_ACCESS”
For the code line

 if([*userChoice isEqualToString:@"yes"])

The full code is:

void initGame (void);
void restartGame(void);
void toGoOn(char *playerChoice);


int guess=-1;
int from=-1;
int to=-1;
bool playStatus=true;
bool gameStatus=true;
int answer=-1;
NSString *userChoice[10];

//if true the game is on

int main (int argc, const char * argv[])
{

    @autoreleasepool {

        GuessManager *game=GUESS;  
        NSLog(@"Hello, lets play");
        NSLog(@"Please provide a positive range in which you would like to play");
      do{
          initGame();
          [game setnumberToGuess:from :to];
        do {                       
            printf("Make you guess:");
            scanf("%d", &guess);
            [game setUserGuess:guess];
            [game checkUserGuess];
            if([game getDidIgetIt])
            {
                playStatus=false;               
            } 
            else
            {
                playStatus=true;
            }

        } while (playStatus);
         restartGame();
      }while(gameStatus);  
        printf("Thanks For Playing PanGogi Games! GoodBye");
    }
    return 0;
}





void initGame (void)
{
    printf("from:");
    scanf("%d",&from);
    printf("to:");
    scanf("%d",&to);    
}

void restartGame(void)
{
    printf("Would you like to continue?(yes/no)");
    scanf("%s",&userChoice); 
    //scanf("%d",&answer); 

   // if(answer==1)
    if([*userChoice isEqualToString:@"yes"])
    {
        gameStatus=true;
    }
    else
    {
        gameStatus=false;
    }
}

I understand that its related to the NSString variable userChoice and how its used in
the if, but what i cant find is what am i doing wrong.

Please help 🙂

Answer 1

You have 3 errors in the code

1) I think you are getting confused with NSString and C style char array… You just need to use single NSString object to save multi character data..

NSString *userChoice;   

2) Since you want to input data using scanf, you need a C style character array. scanf won’t work with NSString types.

char tempArray[10];
int count = scanf("%s",&tempArray);
userChoice  = [NSString stringWithBytes:tempArray length:count encoding: NSUTF8StringEncoding];

3) Now you can use NSString directly.. No need for pointer like syntax

if( [userChoice isEqualToString: @"yes"]){
   .....
   .....
}