example_execute_time.c

#include 
#include 

main() {
  int i;
  time_t time_start,time_stop,t1,t2,t3,t4;
  
  (void) time(&time_start);
  for (i=1;i<=30000;++i) printf("%d %d %d\nn",i, i*i, i*i*i);
  
  (void) time(&time_stop);
  printf("n Time to do 300 squares and cubes= %d seconds\n", (int) time_stop-time_start);
}