Thread: printf waits until main returns to display

Wow. What if you put a newline in there:

Code:

printf("Enter an index: \n");

Which I know you don't want to do that in this case, but it could be your buffer isn't flushed until a newline (or the buffer is full) which wouldn't be unusual.

It really is about the OS, by the way. But if you are used to Java, the Java VM/interpreter probably includes a mechanism to make it's own behavior uniform, taking the OS's behaviour into account. As you point out, C is not so fancy.

No, <string.h> is a standard library.

Also, sizeof will lie about the length of strings like

Code:

char s[100] = "Hello";

Originally Posted by anon

Also, sizeof will lie about the length of strings like

Code:

char s[100] = "Hello";

Incorrect! The string is 5 characters long, which is what strlen() will report.

strlen should be in string.h

Edit:
what the hell? Before I posted this then bright's question about strlen() was the last reply and now when I click submit 2 more replies pop up.. forum bug?

Originally Posted by brightmatter

It was my impression that sizeof didn't lie so much as it just includes the null terminator at the end of a C-style char array

Try this:

Code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main (void) {
	char *sp = malloc(12);

	strcpy(sp,"hello world");
	printf("%d %d\n",sizeof(sp),strlen(sp));
        free(sp);

	return 0;
}