swap by reference

Swap.cpp

#include <iostream>


using namespace std;

void Swap (int& x,int& y);

int main()
{
    int a=3,b=4;
    Swap(a,b);
    cout<<"a= "<<a<<endl;
    cout<<"b= "<<b;

return 0;
}

void Swap (int& x,int& y)
{
int temp;
temp=x;
x=y;
y=temp;
}