/ ************************************************************************ * * problem: Display an Ascii table. Fab version * Author: M J Leslie * Date: 12-Mar-94 * ************************************************************************/ #include <stdio.h> /* printf, putchar, fopen, fclose */ /* Function declarations */ int ascii(int); main() { ascii('h'); /* ascii table in Hex */ ascii('d'); /* ascii table in decimal */ ascii('r'); /* test invalid option */ } /************************************************************************* O/P an ascii table Parms: int - O/P type 'h' hex 'd' decimal any other value not allowed. Return codes: 0 = OK 1 = Invalid parms passed. *************************************************************************/ #define LINEBREAK 8 #define FALSE 0 #define TRUE 1 int ascii(int type) { int ascii, inc=0; char ch; /* 'ascii' in char format. */ char format[10]; /* Format statement for printf */ /* Are we to O/P in hex or decimal? h - hex d - decimal */ switch(type) { case 'h' : strcpy(format,"%02X %c "); /* hex */ break; case 'd' : strcpy(format,"%03d %c "); /* decimal */ break; default : printf("\n Function syntax:\n"); /* error */ printf(" ascii('h') for hex O/P\n"); printf(" ascii('d') for decimal O/P\n"); return(1); } /* O/P a table heading */ printf("\n\tAscii table"); printf("\n\t-----------\n\n"); /* O/P the table */ for (ascii=0; ascii<=127; ascii++) /* loop through the Ascii codes */ { /* Check that the character is printable... */ ch = ascii; if ( isprint(ch) == FALSE ) ch = ' '; /* Replace with ' ' if not printable */ printf(format, ascii, ch); /* O/P numeric and character format */ /* count # of codes O/P and insert L/F when required */ if ( ++inc%LINEBREAK == 0 ) printf("\n"); } return(0); }
file: /Techref/language/ccpp/cref/PROBLEMS/ascii2.c, 1KB, , updated: 1997/4/21 08:53, local time: 2024/12/12 10:28,
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