Default Argument

This is the feature of C++ if a programmer put any value for default which appear unless any value is input.

Here you can see on the function named 'display' we just input the value of a is 67 if no other value is supplied. later when we put the value of 500 in the function it overwrite and give the last value which we input.

 /*Default Argument*/

#include<iostream>

using namespace std;

void display(int a=67){

cout<<a<<endl;

}

int main(){

display();

cout<<endl;

display(500);

return 0;}