X-Map-MIXER-Originators: true
To: djgpp AT delorie DOT com
From: "Penza Kenneth at MITTS"
 <kenneth DOT penza AT magnet DOT mt>
MIME-Version: 1.0
Date: 7 Mar 2001 19:27:00 +0100
Subject: question
Envelope-ID: JA8AAAAABrrLhgABYQABlXwdgctU AT magnet DOT mt
Message-Id: <JA8AAAAABrrLhgABYQABlXwdgctU@magnet.mt>
Disposition-Notification-To: kenneth DOT penza AT magnet DOT mt
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Reply-To: djgpp AT delorie DOT com

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Hi,
        I am experiencing problems when using the fflush function.
I am compiling the program with both Borland C Compiler and gcc, with both
compilers no error crops up. However the BCC version works fine, whilst the
gcc version is ignoring the fflush (stdin).

Attached please find the code I am using. Am I doing something wrong =3F

I am using djgpp version 2.03 on Windows 95.

Thanks
Kenneth

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/*
        The command line I am using to compile with gcc:
        gcc -Wall -g -ansi -pedantic question.c -o question.exe
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>

void exit=5Ffn1(void)
{  /* Exit function called prior to exiting to OS*/
   printf("\nExit function #1 called\n");
}

int main(int argc, char **argv)
{
        int count; /*Counter to=20process commandline args*/
        char ch;   /*char to take input from user switch*/
        int num;   /*Where to store the=20number given by the user*/
        char keynum[10]; /*Where the number is being stored (fgets)*/
	atexit(exit=5Ffn1); /*setting=20up exit functions*/
	printf ("\n\nChecking input switches\n");
	if (argc <2) printf ("No commandline parameters given\n");
	for (count =3D 1; count < argc ;count++)
		{            /* Displays switch as they are */
			printf ("Switch %d is %s \n",count ,argv[count]);
		}
	printf("Q - To Quit, A - Enter value\n");
	while (1)
		{
			ch =3D toupper(fgetc(stdin)); /*get input from user in upper case*/
			if (ch =3D=3D 'Q') break; /* To exit loop*/
			switch (ch) {
				case 'A':	{
                         =20              printf ("A");=20
                                        printf ("Enter number : ");
                            =20           fflush(stdin);/*Flush input strea=
m for another input*/
                                        fgets (keynum , sizeof(keynum) , st=
din);
					sscanf (keynum , "%d" , &num);
					printf ("\nNumber entered is : %d", num);
					printf ("\n**Number has been entered");
					break;
						}
				default:    printf("Q - To Quit, A - Enter value\n");
				}     /*prints menu*/
		}
	return 0;
}




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