how to let 125 become 521

[ll1234]

Write your question here.
how to cin 125(one hundred and twenty five),cout 521 (five hundred and twenty one).

[SakurasouBusters]

1.

int a;
cout << "Enter 125 : ";
cin >> a; // Enter 125 from console 

2.
cout << 521;

[mpark4656]

@SakurasouBusters: I think the OP may want to know how to reverse any given integer. If the program only printed reversed 125, it'd pretty useless.

@ll1234: To reverse an Integer, there are several ways to do it.

Easiest I found is simply turn it into a String or array of char and then reverse the order.

#include <string>
#include <iostream>

int main()
{
    std::string input;
    std::cout << "Enter a number: ";
    std::cin >> input;

    for( int i = input.size() - 1 ; i >= 0 ; i--  )
    {
        std::cout << input[i];
    }
}

[loonielou]

And if you want 521 as an int..

#include <algorithm>
#include <iostream>
#include <string>
#include <sstream>


int main() {
   std::string input;
   std::stringstream ss;
   int reverse_num;

  std::cout << "Enter a number: ";
  std::cin >> input;

   std::reverse(input.begin(), input.end());
   
   ss << input;
   ss >> reverse_num;
  
  std::cout >> reverse_num;
}

Just make sure that input is digit.