C++ Program to reverse a number using pointers

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In this program, You will learn how to reverse a number using pointers in C++.

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123 => 321

456 => 654

Example: How to reverse a number using pointers in C++.

#include<iostream>
using namespace std;

int main() {

    int n, r, rev = 0;
    int *num;

    cout << "Enter a number:";
    cin >> n;

    num = &n;

    while (*num > 0) {
        r = *num % 10;
        rev = rev * 10 + r;
        *num = *num / 10;
    }

    cout << "Reverse number is:" << rev;

    return 0;
}

Output:

Enter a number:123
Reverse number is:321