C++ Program to check number is even or odd using call by Reference

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In this program, You will learn how to check number is even or odd 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 even or odd using call by Reference in C++.

#include<iostream>
using namespace std;

void check(int n, int *p) {

    if( n % 2 == 0){
        *p = 1;
    }else{
        *p = 0;
    }
}

int main() {

    int n, p = 1;
    cout<< "Enter a number:";
    cin>> n;

    check(n, &p);

    if (p == 1) {
        cout<< "Number is even:"<< n;
    } else {
        cout<< "Number is odd:"<< n;
    }

    return 0;
}

Output:

Enter a number:13
Number is odd:13