check int strict

intcheck.m

#import <Foundation/Foundation.h>
#import <Foundation/NSString.h>
#import <Foundation/NSArray.h>

// gcc intcheck.m -framework Foundation && ./a.out
int main(void) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    NSArray* test = [NSArray arrayWithObjects:@"123aa", @"123.0", @"123", @"-123", nil]; // f, f, t, t
    for (NSString* i in test) {
        if ([i isEqualToString: [NSString stringWithFormat:@"%d", [i intValue]]]) {
            NSLog(@"%@ is integer!!", i);
        } else {
            NSLog(@"%@ is not integer!!", i);
        }
    }

    [pool release];
    return 0;
}