#include <iostream>
using namespace std;
// function definition to swap the values.
void swap(int &x, int &y) {
int temp;
temp = x; /* save the value at address x */
x = y; /* put y into x */
y = temp; /* put x into y */
return;
}
// function declaration
void swap(int &x, int &y);
int main () {
// local variable declaration:
int a = 100;
int b = 200;
cout << Before swap, value of a : << a << endl;
cout << Before swap, value of b : << b << endl;
/* calling a function to swap the values using variable reference.*/
swap(a, b);
cout << After swap, value of a : << a << endl;
cout << After swap, value of b : << b << endl;
return 0;
}
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