Fractional Secs in C

[user0182]

Hey Guys,

i've created the following program, which outputs the string 'output' once a second.

#include <stdio.h>
#include <time.h>

int main(){
	time_t cal_tm;
	time_t lst_tm;

	cal_tm=time(NULL);
	lst_tm=cal_tm;

	while(1){
		cal_tm=time(NULL);

		if(cal_tm>lst_tm){
			printf("output\n");
			lst_tm=cal_tm;
		}
	}
}

my question is, i was wondering how one would time intervals of less than 1 second in C and C++? for example, if i wanted to output the string 'output' every 0.5 of a second or 0.25 of a second etc.


thanks in advance,

- user0182