Time delay in C

timer.c

#include <stdio.h> 
#include <time.h> 
  
void delay(int number_of_seconds) {
    int milli_seconds = CLOCKS_PER_SEC * number_of_seconds;
  
    clock_t start_time = clock();
  
    while (clock() < start_time + milli_seconds) {}
}

int main() {
    int i;

    for (i = 0; i < 10; i++) {
        delay(1);
        printf("%d seconds have passed\n", i + 1);
    }

    return 0;
}