DefaultAgruments.cpp

//Default agruments

#include<iostream>
using namespace std;

int add(int ,int=0 ,int=0);
int main(){
	int a,b;
	cout<<"enter two no.";
	cin>>a>>b;
	cout<<"sum is "<<add(a,b);
	int c;
	cout<<"\n enter three numbers";
	cin>>a>>b>>c;
	cout<<"sum is "<<add(a,b,c);
	return 0;
}

int add(int x,int y, int z){
	return (x+y+z);
}