puts( );

**xddxogm3** · 03-27-2005

please forgive the simplicity of the question, but I haven't seen this one line of code yet.
I found this line of code at
http://faq.cprogramming.com/cgi-bin/...&id=1043284385
searching for in on google and this forum brings up too many literal uses of the word puts, but not the use of it as code.
from what i read, it looks like it just outputs (prints) to the default device (monitor)
is this correct? does it do anything else? does anyone know what the code of the function looks like?
is it overloaded with other capabilities?

Code:

  for (i = 0; i < num; i++)
	puts ("Looping");

**Quantum1024** · 03-27-2005

You're correct, puts outputs a string to stdout which is usually the monitor. It will only except a pointer to a string. The code of the function depends on the implamentation of the c language, I would imagine it is very simple, the function is probably just a wrapper around some OS function to output text.

**xddxogm3** · 03-27-2005

i'm assuming from the simplicity of the function, that it is a portable function.
Is this correct?

**itsme86** · 03-27-2005

does anyone know what the code of the function looks like?

I'm guessing something like:

Code:

int puts(const char *str)
{
  char *s;

  for(s = str;*s;s++)
    if(fputc(*s, stdout) == EOF)
      return EOF;

  return 1;
}

**l0cke** · 03-27-2005

puts() also prints the new line character at the end for you. So you could type:

Code:

puts("hello world!");

instead of

Code:

printf("hello world!\n");

**xddxogm3** · 03-27-2005

is it standard (portable)?

**Quantum1024** · 03-27-2005

Yes, puts is part of the c standard.

**0rion** · 03-27-2005

If you have seen fputs() before, I tend to just think of puts() as fputs(const char *s, stdout). So you just don't need to specify where the stream goes to since it always defaults to stdout. Much like printf() and fprintf() etc.

**itsme86** · 03-28-2005

Except, puts() appends a newline and fputs() doesn't.

**nonpuz** · 03-28-2005

Searching google for something like "man puts()" usually helps for function definitions/syntax declaration.

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