How to reverse a number?

Question

example : 571 ---> 175

Answer 1

You could take in the number as a string, and reverse it from there. Note that this will reverse literally any string, not just numbers:

#include <iostream>
#include <string>

using namespace std;

int main()
{
string num;
int numLgth;
cout << "Enter a number: ";
getline(cin, num);
numLgth = num.length();
for (int i = numLgth - 1; i >= 0; i--)
cout << num.at(i);
}

Answer 2

other way:
#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main(void) {
int num;
cin >> num;
string tmp = to_string(num);
reverse(tmp.begin(), tmp.end());
cout << tmp << endl;
return 0;
}