Clearing the input stream

Someone told me to use this to clear input buffer

Code:

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

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

Code:

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#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;
}

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

The program works as expected, though.

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 }).

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

ALL the programs I write end like this

Code:

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

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But the compiler never waits for a new line there.

Quote:

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

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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 }.

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

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

Thanks that works :)

Quote:

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

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Can you give me a link to this reference?

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

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.

Quote:

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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.

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

On a different line: why does it require it?