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# C++ Program For Swapping Two Number In Function Using Pointer

In this program, we will learn how to swap two numbers using pointers in C++.

## Swapping Two Number In Function Using Pointer In C++

The simplest and probably most widely used method to swap two variables is to use a third temporary variable:

temp := x
x:= y
y:= temp

Before proceeding to the implementation of the program, let's understand the approach. Here, instead of using the simple variables, we will be dealing in terms of the pointers.

``````#include <iostream>
using namespace std;

//Swap function to swap 2 numbers
void swap(int *num1, int *num2) {
int temp;
//Copy the value of num1 to some temp variable
temp = *num1;

//Copy the value of num2 to num1
*num1 = *num2;

//Copy the value of num1 stored in temp to num2
*num2 = temp;
}

int main() {
int num1, num2;

//Inputting 2 numbers from user
cout<<"Enter the first number : ";
cin>>num1;
cout<<"Enter the Second number : ";
cin>>num2;

//Passing the addresses of num1 and num2
swap(&num1, &num2);

//Printing the swapped values of num1 and num2
cout<<"First number : "<< num1;
cout<<"Second number: "<<num2;

return (0);
}``````

Enter the first number : 23
Enter the Second number : 5
First number : 5
Second number: 23

## Conclusion

Here, we have learned how to implement a C++ program For Swapping Two Number In Function Using Pointer.

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