How to convert unsigned long to string

Question

In the C language, how do I convert unsigned long value to a string (char *) and keep my source code portable or just recompile it to work

Answer 1

For a long value you need to add the length info 'l' and 'u' for unsigned decimal integer,

as a reference of available options see sprintf

#include 

    int main ()
    {
      unsigned long lval = 123;
      char buffer [50];
      sprintf (buffer, "%lu" , lval );
     }