usetat - Replaces a character in a string. Allegro game programming library.

       Replaces  the character at the specified index in the string with value `c', handling any adjustments for
       variable width data (ie. if `c' encodes to a different width than the previous value at  that  location).
       If `index' is negative, it counts backward from the end of the string. Example:

          usetat(text_string, 2, letter_a);

       usetat - Replaces a character in a string. Allegro game programming library.

       Returns  the number of bytes by which the trailing part of the string was moved. This is of interest only
       with text encoding formats where characters have a variable length, like UTF-8.

uoffset(3alleg4), ugetat(3alleg4), uinsert(3alleg4), uremove(3alleg4)

Allegro                                           version 4.4.3                                  usetat(3alleg4)

#include<allegro.h>intusetat(char*s,intindex,intc);