Clearing the input stream

[abh!shek]

Someone told me to use this to clear input buffer

while((ch=getchar())!='\n' && ch!=EOF);

...and now this is giving me a warning:

#include<stdio.h>
int main()
{
   char a,b,ch;
   printf("\nEnter a character:");
   a=getchar();
   while((ch=getchar())!='\n' && ch!=EOF);   
   printf("\nEnter another one:");
   b=getchar();
   while((ch=getchar())!='\n' && ch!=EOF);
   printf("You entered %c and %c\n",a,b);
   return 0;
}

13:3: warning: no newline at end of file

The program works as expected, though.

[root4]

The warning has nothing to do with the code you added, it simply says the compiler waits for a new line at the end of your source file (after the last }).

[abh!shek]

Why should the compiler wait for new line after the closing brace?

ALL the programs I write end like this

     /****************/
     /****************/
     return 0;
}

But the compiler never waits for a new line there.

[root4]

Why should the compiler wait for new line after the closing brace?

The C standard requires the source files to end by a new line character, that's all. In your case, it's after the }, I didn't said it always has to be after the last }.

[abh!shek]

What should I change/add in this source to get rid of the warning...? You know...I don't like getting compiler warnings.

[root4]

Open the source file in your favorite editor, move the cursor to the very end and press enter, save and recompile.

[abh!shek]

Thanks that works

The C standard requires the source files to end by a new line character, that's all.

Can you give me a link to this reference?

[root4]

Section 5.1.1.2 of the standard (http://www.open-std.org/jtc1/sc22/wg...docs/n1124.pdf)

[cpjust]

Is that requirement in the C++ standard too?
Someone told me some compilers require it, so I've always done it because I thought it was a compiler bug.

[laserlight]

Is that requirement in the C++ standard too?
Someone told me some compilers require it, so I've always done it because I thought it was a compiler bug.

Yes, the C++ Standard requires that as well.

[Elysia]

On a different line: why does it require it?