How to stringify an expression in C

Question

Is there a way to evaluate an expression before stringification in c?

example:

#define stringify(x)  #x
...
const char * thestring = stringify( 10 *          


        

Answer 1

Preprocessor macros are run before the compiler. It is, by definition, not possible to do exactly what you'retrying to do.

To convert a number into a string at runtime, call the itoa function, like this:

char thestring[8];

itoa(10 * 50, thestring, 10);

Note that this code declares thestring as an array, not a pointer. For more information, read about memory management in C.