【iOS7开发快速入门】代码示例3-5

以下程序通过使用自增自减运算符实现运算。程序代码如下：

#import <Foundation/Foundation.h>
int main(int argc, const char * argv[]) {
@autoreleasepool {
// insert code here...
NSLog(@"Hello, This is a sample 3.5 of the book 《iOS7 开发快速入门》!");
int a;
a=9;
NSLog(@"%i,%i",a,++a);
NSLog(@"%i,%i",a,a++);
NSLog(@"%i,%i",a,--a);
NSLog(@"%i,%i",a,a--);
NSLog(@"%i",a);
}
return 0;
}

运行结果如下：

2015-01-18 11:16:50.181 Sample.3.5[1045:67812] Hello, This is a sample 3.5 of the book 《iOS7 开发快速入门》!

2015-01-18 11:16:50.182 Sample.3.5[1045:67812] 9,10

2015-01-18 11:16:50.182 Sample.3.5[1045:67812] 10,10

2015-01-18 11:16:50.182 Sample.3.5[1045:67812] 11,10

2015-01-18 11:16:50.183 Sample.3.5[1045:67812] 10,10

2015-01-18 11:16:50.183 Sample.3.5[1045:67812] 9

Program ended with exit code: 0