C examples for Data Type:Date Time
Test Date and Time Functions
#include <stdio.h> #include <time.h> #include <math.h> #include <ctype.h> int main(void){ time_t calendar_start = time(NULL); // Initial calendar time clock_t cpu_start = clock(); // Initial processor time int count = 0; // Count of number of loops const long long iterations = 10000LL; char answer = 'y'; double x = 0.0; printf("Initial clock time = %lld Initial calendar time = %lld\n",(long long)cpu_start, (long long)calendar_start); while(tolower(answer) == 'y') {/*from w w w . j a v a 2 s .c o m*/ for(long long i = 0LL ; i < iterations ; ++i){ x = sqrt(3.14159265); } printf("%lld square roots completed.\n", iterations*(++count)); printf("Do you want to run some more(y or n)? \n"); scanf("\n%c", &answer, sizeof(answer)); } clock_t cpu_end = clock(); // Final cpu time time_t calendar_end = time(NULL); // Final calendar time printf("Final clock time = %lld Final calendar time = %lld\n", (long long)cpu_end, (long long)calendar_end); printf("CPU time for %lld iterations is %.2lf seconds\n", count*iterations, ((double)(cpu_end-cpu_start))/CLOCKS_PER_SEC); printf("Elapsed calendar time to execute the program is %8.2lf seconds.\n", difftime(calendar_end, calendar_start)); return 0; }