重载_2.cpp

关于如何用C语言编写重载的例子

#include <iostream.h>
const double PI=3.1415;
double length(float r)
{
   return 2*PI*r;
}
double length(float x,float y)
{
   return 2*(x+y);
}
void main()
{
float a,b,r;
cout<<"输入圆半径：";
cin>>r;
cout<<"圆周长："<<length(r)<<endl;
cout<<"输入矩形长和宽：";
cin>>a>>b;
cout<<"矩形周长："<<length(a,b)<<endl;
}