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POObjective C Char Array Issue
 

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  1. POObjective C Char Array Issue
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    <p>Hey guys so I'm trying to learn objective c as an independent study for my school and one of my projects just to practice is making a calculator program where the user inputs a string of numbers and operators and the program breaks it apart and does the calculation. Right now I have the input and I'm trying to have it find the operators and put them all in an array so that it can sort them to find order of operations and use the indices to find the different terms; however, when I try to print out the array to see if its holding the chars, it outputs some weird symbols like the apple logo or an upside down question mark. I've made an SSCCE of my problem -- does anyone know whats going on?</p> <pre><code>int main(int argc, const char * argv[]) { @autoreleasepool { NSString *calculation; char str[50] = {0}; int count = 0; NSLog(@"What would you like to calculate?"); scanf("%s", str); calculation = [NSString stringWithUTF8String:str]; for (int i = 0; i &lt; [calculation length]; i++) { NSRange range = NSMakeRange (i, 1); if([[calculation substringWithRange: range] isEqualToString: @"*"] || [[calculation substringWithRange: range] isEqualToString: @"/"]) count++; } char operators[count]; for (int i = 0; i &lt; count; i++) { for (int j = 0; j &lt; [calculation length]; j++) { NSRange range = NSMakeRange (j, 1); NSString *s = [s initWithString:[calculation substringWithRange: range]]; if([s isEqualToString:@"*"]){ operators[i] = '*'; break; } if([s isEqualToString:@"/"]){ operators[i] = '/'; break; } } NSLog(@"%c", operators[i]); } } return 0; } </code></pre>
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    1. USamaurea
    1. USMatt Cooper
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    1. COWhy aren't you using `-characterAtIndex`?
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      1. USRichard J. Ross III
 

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