How to reverse digits of number in cpp?

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

    int reverseDigits(int num)
    {
        string strin=to_string(num);   //covert integer to char to print zero.
        reverse(strin.begin(), strin.end());
        num=stoi(strin);
        cout<<"Reverse of num entered: ";
        for(char p:strin){
            cout<<p;
        }

        return 0;
    }

int main(){
    int num;
    cout<<"Enter a number : ";
    cin>>num;
    reverseDigits(num);
    cout<<endl<<endl;
    cout<<code by vksssd;
    return 0;
}