编程学习网为您整理以下代码实例，主要实现：测试日期和时间函数，希望可以帮到各位朋友。
@H_404_1@#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')
{
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;
}
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