Thread: Frustration with tutorial.

I got the book "C for Dummies volume II". printed in 1997. I'm using the djgpp compiler.

It seems that djgpp doesn't recognize the 'strcmpi' function though it recognize 'strcmp'.

Also while doing a small metric program that converts miles to kilometers, I get this:

Code:

Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

C:\Documents and Settings\Bob L Woods>cd c:\djgpp

C:\DJGPP>cd mystuff

C:\DJGPP\Mystuff>gcc metric.c -o metric
Cannot load VDM IPX/SPX support
metric.c:14:9: warning: unknown escape sequence: '\040'
metric.c: In function 'main':
metric.c:5: warning: return type of 'main' is not 'int'

C:\DJGPP\Mystuff>metric
Enter a value in miles:18
0.00 miles work out to 0.00 kilometers
C:\DJGPP\Mystuff>

Here is the source code:

Code:

void main()
{
	char input[20];
	double miles,kilometers;

	printf("Enter a value in miles:");
	miles=atof(gets(input));

	kilometers=miles*1.609;

	printf("%.2f miles work out to\ %.2f kilometers",miles,kilometers);
}

Can anyone tell me if its something I'm doing wrong or if perhaps my copy of DJGPP is missing files or corrupted?

For the love of Pete, can you use Visual Studio? There are free versions now and everything.
Oh, and before someone else says it, main should return int, not void (which djgpp is nicely letting you know!)

Code:

int main() 
{
   return 0;
}

ok I'm not worried about the warnings. thanks for letting me know about the strcmpi being non standard. It's stricmp for standard right?

Anyways, it still doesn't tell me why this particular program will not work. Any help anyone could give would be nice.

I'll look into the Visual Studioo free version. Is it crippled in some way?

sigh

Originally Posted by Elysia

Avoid void main.
Yes, the free version is somewhat crippled. No MFC, no resource editor being the biggest you new programmers. Don't worry, it's still plenty useful.

Ok thanks, took a peek and I'll clean that crap out a little later.

It's odd, because this works:

Code:

#include <stdio.h>
#include <stdlib.h>

main()
{
	char	
	AmountDue[20];
	double	amountdue;

	printf("Enter the amount due: ");
	scanf("&#37;s",AmountDue);

	amountdue=atof(AmountDue);
	printf("The amount due is '%s' -> %g\n",AmountDue, amountdue);

}

But the first posted code acts like I've put in a non-numerical string, with nothing to convert to float.

Originally Posted by vart

And what will happen with this "working" code if the user inputs string of 40 characters?

Buffer overflow obviously. But its just a tut to get you acquainted with things.