What does this do?

Just a bit of fun :)

Code:

---

#include <stdio.h>

int main ( void ) {
    printf,"%d",32;
    return 0;
}

---

- does it compile?
- does it run?
- what's the output?

Yes, yes, and nothing.

You should have used invisible text or something, so as not to spoil things for the rest of us . . . :)

http://www.eskimo.com/~scs/cclass/int/sx4db.html

EDIT: Ok, so I wasn't supposed to compile it, sorry. I thought maybe it was some experiment or something. I guess I could do like dwks said and color my text invisible.

I was going to mention the warnings, but you beat me to it.

It's kind of like doing this.

Code:

---

#include <stdio.h>

int main(void) {
    printf;
    "&#37;d";
    32;
    return 0;
}

---

so you get three warnings about statements that do nothing.

Quote:

---

Originally Posted by dwks

You should have used invisible text or something, so as not to spoil things for the rest of us . . . :)

---

Yeah. Kinda thoughtless, sorry.

S'ok. swoopy did exactly the same thing, after all. :)

What would make it more interesting would be if you used the return value.

Code:

---

int x = printf, "%d", 32;

---

I'm sure many people know that printf() returns the number of characters printed (but who ever uses that value?), so you might think that x is set to 2. But no, it's 32. :)

After your first post, I thought maybe it outputted a space, so I double checked, and it did not.

Here's some more fun:

Code:

---

#include <stdio.h>

int main(void)
{
    char s[4];
    return printf(s, sprintf(s, "%s", "%*p"), printf);
}

---

- what is it printing?
- is the same thing printed after each execution?
- what about after recompiling?

Answer (just guessing, I didn't compile it) in invisible text:
- The address of printf
- almost certainly, unless the dynamic library containing printf() was re-loaded for some reason
- probably, unless printf was linked statically
<end of text>

BTW, you made me re-write my answer several times . . . very nice program. :)

jhgjhg

I agree with dwks.

Well that's just witchcraft ;)