C++ Program to check number is palindrome or not using call by Reference

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In this program, You will learn how to check number is palindrome or not using call by Reference in C++.

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Call by Reference

void check(int n, int *p) { 
       //statement
}

Example: How to check number is palindrome or not using call by Reference in C++.

#include<iostream>
using namespace std;

void check(int n, int *p) {

    int r, rev = 0;
    while (n > 0) {
        r = n % 10;
        rev = rev * 10 + r;
        n = n / 10;
    }
    *p = rev;
}

int main() {

    int n, p = 0;

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

    check(n, &p);
    if (p == n) {
        cout << "Number is palindrome:" << n;
    } else {
        cout << "Number is not palindrome:" << n;
    }

    return 0;
}

Output:

Enter a number:121
Number is palindrome:121