calc code execeute time on c++

double get_time(){struct timeval t;gettimeofday(&t, NULL);double d = t.tv_sec + (double) t.tv_usec/1000000;return d;}...double time_start = get_time();...double time_end = get_time();printf("This program has run for: %f seconds.\n",  time_end - time_start);


#include<stdio.h>#include<time.h>void do_something(){for(int i=0;i<100000;i++)for(int j=0;j<10000;j++);}int main(int arg,char ** argv){clock_t start=clock();do_something();clock_t end=clock();float time=(float)(end-start)/CLOCKS_PER_SEC;printf("%f\n",time);return 0;}