/ ************************************************************************
*
* 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);
}
.