#include <stdio.h>

#include <sys/time.h>

#include <time.h>

int gettimeofday(struct timeval*tv,struct timezone *tz);

int main(int argc, char* argv[])

{

   int timeuse;

   struct timeval starttime,endtime;

   gettimeofday(&starttime,);

     sleep();

   gettimeofday(&endtime,);

   timeuse=(endtime.tv_sec-starttime.tv_sec)*+endtime.tv_usec-starttime.tv_usec;

   timeuse/= ;

   printf("the programme run %d second/n the result of 1+2+3+....100 \n ",timeuse);

   printf("Hello World!\n");

    return ;

}