ITOA    PUTS    DISPXY  GETC    GETS    ATOI    STRPD   XINIT   MEMCPY  KBHIT   PUTC    STRCPY  STRCAT  STRSTR  EXIT    ISNUM   ISALPHA TOUPPER MEMSET  FGETC   FOPEN   FPUTC   FCLOSE  REVCPY  ISALNUM ISSPACE FGETS   FPUTS   STRCMP  CUPPER  FPRINTF PRINTF  SPRINTF SSCANF  SCANF   FSCANF