Write a C plus plus program to interchange two numbers by using function?

Answer 1

#include<iostream>

template<typename _Ty>void swap (_Ty& a, _Ty& b)

{

_Ty temp = a;

a = b;

b = temp;

}

int main()

{

int x = 42;

int y = 0;

std::cout << "Before swap:" << std::endl;

std::cout << "x = " << x << ", y = " << y << std::endl;

swap (x, y);

std::cout << "After swap:" << std::endl;

std::cout << "x = " << x << ", y = " << y << std::endl;

}

Example Output

Before swap:

x = 42, y = 0

After swap:

x = 0, y = 42

Answer 2

// with temporary variable:

void swap(int& x, int& y){ int t=x; x=y; y=t; }

// without temporary variable:

void swap(int& x, int& y){ x^=y^=x^=y; }

Answer 3

#include<iostream>

int main()

{

int x=40;

int y=2;

// Swap the values of x and y:

int temp=x;

x=y;

y=temp;

}