C and C++ program to calculate area of square and area of rectangle using function

#include "iostream.h"
int area(int s)
{
 return(s * s);
}
float area(int b , int h)
{
 return(0.5 * b * h);
}
main()
{
 cout << area(5) << endl;
 cout << area(4,3) << endl;
 cout << area(6, area(3)) << endl;
 return 0;
}
 
Source: http://www.learncandcpp.com/2012/02/c-program-to-find-area-of-rectangle.html