#import <Foundation/Foundation.h>

int main (int argc, char *argv[])
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    int n, number, triangularNumber, counter;

    for ( counter = 1; counter <= 5; ++counter ) {
        NSLog (@"Ktr liczb trjktn chcesz sprawdzi?");
        scanf ("%i", &number);
        triangularNumber = 0;

        for ( n = 1; n <= number; ++n )
            triangularNumber += n;

        NSLog (@"Liczba trjktna numer %i wynosi %i", number, triangularNumber);
    }

    [pool drain];
    return 0;
}