Programming in Objective-C, Sixth Edition

Integer Arithmetic and the Unary Minus Operator

Program 4.3 reinforces what we have just discussed and introduces the concept of integer arithmetic.

Program 4.3

Click here to view code image

// More arithmetic expressions#import <Foundation/Foundation.h>int main (int argc, char * argv[]){   @autoreleasepool {      int   a = 25;      int   b = 2;      float c = 25.0;      float d = 2.0;      NSLog (@"6 + a / 5 * b = %i", 6 + a / 5 * b);      NSLog (@"a / b * b = %i", a / b * b);      NSLog (@"c / d * d = %f", c / d * d);      NSLog (@"-a = %i", -a);   }   return 0;}

Program 4.3 Output

6 + a / 5 * b = 16a / b * b = 24c / d * d = 25.000000-a = -25

We inserted extra blank spaces between int and the declaration of a, b, and result in the first ...