Use two default parameter values : default arguments « Function « C++ Tutorial

1. C++ Tutorial
2. Function
3. default arguments

#include <iostream>
 
 int f(int length, int width = 25, int height = 1);
 
 int main()
 {
     int length = 100;
     int width = 50;
     int height = 2;
     int area;
 
     area = f(length, width, height);
     std::cout << "First time area equals " << area << "\n";
 
     area = f(length, width);
     std::cout << "Second time area equals " << area << "\n";
 
     area = f(length);
     std::cout << "Third time area equals " << area << "\n";
     return 0;
 }
 
 int f(int length, int width, int height)
 {
     return (length * width * height);
 }

First time area equals 10000
Second time area equals 5000
Third time area equals 2500