Reverse of a number with leading zeroes

Question

How do we reverse a number with leading zeroes in number ? For ex: If input is 004, output should be 400.

I wrote below program but it works only when n

Answer 1

Keep the number as a string, and use std::reverse.

std::string num;
std::cout << "Enter number " << std::endl;
std::cin >> num;

std::string rev(num);
std::reverse(rev.begin(), rev.end());

std::cout << "Reverse = " << rev << std::endl;