IOSsquare类集成rectangl类计算面积和周长

定义rectangl类

//
// rectangle.h
// 0827-矩形面积和周长
//
// Created by panba on 15-8-28.
// Copyright (c) 2015年 panba. All rights reserved.
//#import &＃64;interface rectangle : NSObject
&＃64;property int width,height;
-(void) setWidth:(int)width andheight:(int)height;
-(int) returnarea;
-(int) returnperimeter;
&＃64;end


声明rectangl类

//
// rectangle.m
// 0827-矩形面积和周长
//
// Created by panba on 15-8-28.
// Copyright (c) 2015年 panba. All rights reserved.
//#import "rectangle.h"&＃64;implementation rectangle
&＃64;synthesize width,height;
-(void) setWidth:(int)x andheight:(int)y
{width &＃61; x;height &＃61; y;
}
-(int) returnarea
{return width*height;
}
-(int) returnperimeter
{return (width&＃43;height)*2;
}
&＃64;end
定义square类

//
// square.h
// 0827-矩形面积和周长
//
// Created by panba on 15-8-28.
// Copyright (c) 2015年 panba. All rights reserved.
//#import
#import "rectangle.h"
&＃64;interface square : rectangle-(void) setside:(int) n;
-(int) getside;
&＃64;end


声明square类

//
// square.m
// 0827-矩形面积和周长
//
// Created by panba on 15-8-28.
// Copyright (c) 2015年 panba. All rights reserved.
//#import "square.h"&＃64;implementation square
-(void) setside:(int) value
{[self setWidth:value andheight:value];
}
-(int) getside
{return self.width;
}
&＃64;end
主函数

//
// main.m
// 0827-矩形面积和周长
//
// Created by panba on 15-8-28.
// Copyright (c) 2015年 panba. All rights reserved.
//#import
#include "rectangle.h"
#include "square.h"
int main(int argc, const char * argv[]) {&＃64;autoreleasepool {rectangle *myrect &＃61; [[rectangle alloc] init];[myrect setWidth:5 andheight:10];NSLog(&＃64;"width &＃61; %i,height &＃61; %i",myrect.width,myrect.height);NSLog(&＃64;"area is %i",[myrect returnarea]);NSLog(&＃64;"preimeter is %i",[myrect returnperimeter]);square *mysqua &＃61; [[square alloc] init];[mysqua setside:9];NSLog(&＃64;"squares side is %i",[mysqua getside ]);NSLog(&＃64;"square area is %i,preimeter is %i",[mysqua returnarea],[mysqua returnperimeter]);}return 0;
}