ILE C/C++ Programmer's Guide

Source Code Sample

The ILE C compiler recognizes source code written in any single-byte EBCDIC CCSID (Coded Character Set Identifier) except CCSID 290, 905 and 1026. See Chapter 31, Internationalizing a Program for information on CCSIDs.

Some characters from the C and C++ character set are not available in all environments. You can enter these characters into a C or C++ source program using a sequence of three characters called a trigraph.

Note:
For more information about using trigraph sequences, see WebSphere Development Studio: ILE C/C++ Language Reference.

C language onlyThe C compiler also supports digraphs. (The C++ compiler does not support digraphs.)

Figure 2. ILE C Source to Add Integers and Print Characters




/* This program reads input from the terminal, displays characters, */ 
/* and sums and prints the digits. Enter a "+" character to */ 
/* indicate EOF (end-of-file). */ 
 
#define MAXLEN 60 /* The maximum input line size. */ 
 
#include <stdio.h> 
#include <ctype.h> 
 
void main(void) 

int c; 
int i = 0, j = 0; 
int sum = 0; 
int count, cnt; 
int num[MAXLEN]; /* An array of digits. */ 
char letter??(MAXLEN??); /* An array of characters. Trigraphs 
replace the square brackets. */ 
 
while ( ( c = getchar( ) ) != '+' ) 

if ( isalpha ( c ) ) /* A test for an alphabetic */ 
{ /* character. */ 
letter[i++] = c; 

else if ( isdigit ( c ) ) /* A test for a decimal digit. */ 

num??(j++??) = c - '0'; /* Trigraphs replace the square 
brackets. */ 


printf ( "Characters are " ); 
for ( count = 0; count < i; ++count ) 

printf ( "%c", letter[count] );
}
printf( "\nSum of Digits is " ); 
for ( cnt = 0; cnt < j; ++cnt ) 

sum += num[cnt]; 

printf ( "%d\n", sum ); 
}


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