reverse the position of integer digits?

Question

i have to reverse the position of integer like this

input = 12345

output = 54321

i made this but it gives wrong output e.g 5432

#include         


        

Answer 1

If I were doing it, I'd (probably) start by creating the new value as an int, and then print out that value. I think this should simplify the code a bit. As pseudocode, it'd look something like:

output = 0;

while (input !=0)
    output *= 10
    output += input % 10
    input /= 10
}
print output

The other obvious possibility would be to convert to a string first, then print the string out in reverse:

std::stringstream buffer;

buffer << input;

cout << std::string(buffer.str().rbegin(), buffer.str().rend());