//
// main.m
// OCTrain
//
// Created by 刘丰恺 on 16/7/7.
// Copyright © 2016年 刘丰恺. All rights reserved.
//

#import <Foundation/Foundation.h>

BOOL areIntDifferent(int thing1, int thing2){
 if (thing1 == thing2) {
 return (NO);
 } else {
 return (YES);
 }
}

NSString *boolString(BOOL yesNo){
 if (yesNo == NO) {
 return @"no";
 } else {
 return @"yes";
 }
}


int main(int argc, const char * argv[]) {
 @autoreleasepool {
 BOOL areTheyDifferent;
 
 areTheyDifferent = areIntDifferent(5, 5);
 // 此处的%@标示是NSString类型的指针
 NSLog(@"are %d and %d different? %@",5 ,5, boolString(areTheyDifferent));
 
 areTheyDifferent = areIntDifferent(22, 34);
 
 NSLog(@"are %d and %d different? %@",5 ,5, boolString(areTheyDifferent));
 
 }
 return 0;
}