uisspace - Tells if a character is whitespace. Allegro game programming library.

       Returns nonzero if `c' is whitespace, that is, carriage return, newline, form feed, tab, vertical tab, or
       space. Example:

          for (counter = 0; counter < ustrlen(text_string); counter++) {
             if (uisspace(ugetat(text_string, counter)))
                usetat(text_string, counter, '_');
          }

       uisspace - Tells if a character is whitespace. Allegro game programming library.

uisdigit(3alleg4), ugetc(3alleg4), usetc(3alleg4), uwidth(3alleg4), ucwidth(3alleg4), uisok(3alleg4)

Allegro                                           version 4.4.3                                uisspace(3alleg4)

#include<allegro.h>intuisspace(intc);