15.3 Build Generated issues.

[ScottS]

I can't seem to be able to figure out what it is that's wrong.
The program builds and runs correctly, but X-Code says that build generates issues.

Line 23 (below) indicates 3 warnings as follows:

1- Unused Entity Issue
    Expression result unused

2- Format String Issue
    More '%' conversions than data arguments

3- Unused Entity Issue
    Expression result unused

Heres the code and output...

Code: (Objective-C)

#import <Foundation/Foundation.h>

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

    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    NSString *str1 = @"This is string A";
    NSString *str2 = @"This is string B";
    NSString *res;
    NSComparisonResult compareResult;
    
    
    // Count the number of characters
    NSLog(@"Length od str1 %lu", [str1 length] );
    
    // Copy one strig to another
    res = [NSString stringWithString:str1];
    NSLog(@"copy: %@", res);
    
    // Copy one string to the end of another
    str2 = [str1 stringByAppendingString:str2];
    NSLog(@"Concatentation %@"), str2;
    
    // Test of two strings are equal
    if ([str1 isEqualToString:res] == YES) {
        NSLog(@"str1 == res");
    } else {
        NSLog(@"str1 != res");
    }
    // Test if one string is <, ==, or > to another
    compareResult = [str1 compare: str2];
    if (compareResult == NSOrderedAscending)
        NSLog(@"str1 < str2");
     else if (compareResult == NSOrderedSame)
           NSLog(@"str1 == str2");
     else 
        NSLog(@"str1 > str2");
    
    // Convert string to uppercase
    res = [str1 uppercaseString];
    NSLog(@"Uppercase Conversion: %@", res);
    
    // Convert to lowercase
    NSLog(@"Lowercase Conversion: %@", [str1 lowercaseString]);
    
    NSLog(@"Original String: %@", str1);
    [pool drain];
    return 0;
}

Code: (Objective-C)

// Program Output

This GDB was configured as "x86_64-apple-darwin".tty /dev/ttys000
sharedlibrary apply-load-rules all
[Switching to process 2148 thread 0x0]
2011-05-17 12:50:29.371 PiOC_15-3[2148:903] Length od str1 16
2011-05-17 12:50:29.373 PiOC_15-3[2148:903] copy: This is string A
2011-05-17 12:50:29.374 PiOC_15-3[2148:903] Concatentation This is string AThis is string B
2011-05-17 12:50:29.374 PiOC_15-3[2148:903] str1 == res
2011-05-17 12:50:29.374 PiOC_15-3[2148:903] str1 < str2
2011-05-17 12:50:29.375 PiOC_15-3[2148:903] Uppercase Conversion: THIS IS STRING A
2011-05-17 12:50:29.375 PiOC_15-3[2148:903] Lowercase Conversion: this is string a
2011-05-17 12:50:29.376 PiOC_15-3[2148:903] Original String: This is string A
Program ended with exit code: 0

[skochan]

Line 23, the argument needs to be inside the parens:

Code: (Objective-C)

NSLog(@"Concatentation %@", str2);

Cheers,

Steve