#include <iostream>
#include <cmath>
using namespace std;
double calcualateCircle(double r = 0) {
return acos(-1) * r * r;
}
double calcualateRectangle(double len = 0, double high = 0) {
return len * high;
}
double calcualateSquare(double len = 0) {
return len * len;
}
int main()
{
cout << "请输入用户选择图形的类型" << endl;
cout << "1.圆形 2.长方形 3.正方形" << endl;
int choice;
cin >> choice;
switch (choice){
case 1:
cout << "请输入圆形的半径:" << endl;
double r;
cin >> r;
cout << calcualateCircle(r) << endl;
break;
case 2:
cout << "请输入长方形的宽和高:" << endl;
double len, high;
cin >> len >> high;
cout << calcualateRectangle(len, high) << endl;
break;
case 3:
cout << "请输入正方形的边长:" << endl;
double l;
cin >> l;
cout << calcualateSquare(l) << endl;
break;
default:
cout << "输入错误" << endl;
}
return 0;
}
作者:LightAc
出处:https://www.cnblogs.com/lightac/
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