implement time delay in c

Question

I don\'t know exactly how to word a search for this.. so I haven\'t had any luck finding anything.. :S

I need to implement a time delay in C.

for example I w

Answer 1

// Provides ANSI C method of delaying x milliseconds

#include 
#include 
#include 

void delayMillis(unsigned long ms) {
    clock_t start_ticks = clock();
    unsigned long millis_ticks = CLOCKS_PER_SEC/1000;
    while (clock()-start_ticks < ms*millis_ticks) {
    }
}    

/* 
 * Example output:
 * 
 * CLOCKS_PER_SEC:[1000000]
 * 
 * Test Delay of 800 ms....
 * 
 * start[2054], end[802058], 
 * elapsedSec:[0.802058]
 */
int testDelayMillis() {

    printf("CLOCKS_PER_SEC:[%lu]\n\n", CLOCKS_PER_SEC);
    clock_t start_t, end_t;
    start_t = clock();
    printf("Test Delay of 800 ms....\n", CLOCKS_PER_SEC);
    delayMillis(800); 
    end_t = clock();
    double elapsedSec = end_t/(double)CLOCKS_PER_SEC;
    printf("\nstart[%lu], end[%lu], \nelapsedSec:[%f]\n", start_t, end_t, elapsedSec);

}

int main() {    
    testDelayMillis();
}