%% 简单实现一个求取圆形 长方形 正方形 面积的选择功能
%%初学练手
#include “stdafx.h”
#include “iostream”
#include “math.h”
using namespace std;
//int _tmain(int argc, _TCHAR* argv[])
int main()
{
int itype;
float radius , a ,b ,area;
cout<<“图形类型为 1—圆形;2—长方形;3—正方形:”<<endl;
cin>>itype;
const float pi=3.1415;
switch (itype){
case 1 :
cout<<“圆的半径为:”;
cin>>radius;
area = pi* 0.5*radius*radius;
cout<<“面积为”<<area;
break;
case 2 :
cout<<“长方形的长,宽为:”;
cin>>a>>b;
area = a*b;
cout<<“长方形面积为”<<area;
break;
case 3 :
cout<<“正方形的边长为:”;
cin>>a;
area = a*a;
cout<<“正方形面积为”<<area;
break;
default :
cout<<“输入值不合法!”;
}
system(“pause”);
return 0;
}