C with more than one variable.

**omnificient** · 12-18-2007

When I use one variable I'd do this:

Code:

#include <stdio.h>

int main()
{
 int a;
 printf("Enter: ");
 scanf("%d", &a);
 printf("%d", a);
 getchar();
 getchar();
 return 0;
}

The tutorial doesn't speak about more than one variable, but is this the correct way to use more than one (I've had a program crash when using more than one variable, so just to check)?

Code:

#include <stdio.h>

int main()
{
 int a;
 int b;
 printf("Enter: ");
 scanf("%d", &a);
 printf("%d \n", a);
 printf("Enter: ");
 scanf("%d", &b);
 printf("%d", b);
 getchar();
 getchar();
 return 0;
}

Thank You.

**Elysia** · 12-18-2007

I don't understand what is hard about multiple variables?
But the code is correct.
I also advise you to use a tab or at least 4 spaces for indentation.

**dwks** · 12-18-2007

Sure, that works just fine.

You can actually declare more than one variable in one declaration:

Code:

int a, b;

Some people prefer to do it the way you have it, with two declarations,

Code:

int a;
int b;

but you should at least be aware that you can declare two or more variables at once.

What code were you using when using more than one variable crashed?

[edit]

I also advise you to use a tab or at least 4 spaces for indentation.

Who cares -- it's indented consistently at least!

[/edit]

**matsp** · 12-18-2007

Why don't you try it. Although if you use turbo C [like it seems that many forum users do] you may not see the output of "b = ...", because you don't have a newline on the end, which means that the output isn't printed before the end of the program, and thus you never see it - this is however a "flaw"[1] in the Turbo C runtime libraries, not in the language itself. Make it "b = %d\n" instead, and all will be fine.

[1] I use quotes around flaw because I'm not 100% sure what the language spec says about flushing standard out before input.

--
Mats

**Elysia** · 12-18-2007

Or upgrade the compiler to a newer, better one. Turbo C from what I understand is old and bad. There are newer, free, better alternative compilers such as Dev-Cpp and Visual Studio 2008 Express.

**omnificient** · 12-18-2007

Well I use Bloodshed Dev 4 actually and the original program had something to do with arrays so I'll just thinker a bit with them untill I figure out how they work.

Thanks for al the advice.

PS: I do like to declare my integers one above the other.

**laserlight** · 12-18-2007

Well I use Bloodshed Dev 4 actually

If you want to use Bloodshed Dev-C++, use version 4.9.9.2

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