Objective-C方法的使用

参照

http://blog.csdn.net/qq_14902389/article/details/51814008

中声明的对象对其引用：

#import <Foundation/Foundation.h>#import "Calculator.h"int main(int argc, const char * argv[]) {    @autoreleasepool {                Calculator *clt =[[Calculator alloc]init];／／实例化对象        double pi =[clt pi];／／调用无参方法</span>        NSLog(@"pi的值为%f",pi);        double sq =[clt square:1.5];／／有参        NSLog(@"sq的值为%f",sq);        [clt sumOfNum1:3 :4];            }                return 0;}