什么也不说直接上代码
C++ 代码
#include<bits/stdc++.h>
using namespace std;
int main()
{
double a,b,c;
cin>>a>>b>>c;
cout<<"TRIANGULO: "<<fixed<<setprecision(3)<<a*c/2<<endl;
cout<<"CIRCULO: "<<fixed<<setprecision(3)<<c*c*3.14159<<endl;
cout<<"TRAPEZIO: "<<fixed<<setprecision(3)<<(a+b)*c/2<<endl;
cout<<"QUADRADO: "<<fixed<<setprecision(3)<<b*b<<endl;
cout<<"RETANGULO: "<<fixed<<setprecision(3)<<a*b<<endl;
return 0;
}