Get number into a string C without stdio

Question

I want to know how to get number to string without standard C or C++ functions, for example:

char str[20];
int num = 1234;
// How to convert that number to strin         


        

Answer 1

Convert it char by char, e.g. the last char of the string is '4', the previous one is '3' and so on. Use math to determine the chars, it might be easier to create "4321" string and then rotate it.