我寫了這樣的程式
int main (void) {
time_t t_start, t_end;
clock_t c_start, c_end;
time(&t_start);
c_start = clock();
DoSomeWorks();
time(&t_end);
c_end = clock();
printf("time 1: %f\n", difftime(t_end, t_start);
printf("time 2: %f\n", ((c_end - c_start)/CLOCKS_PER_SEC));
return 0;
}
結果卻是
time 1 = 53
time 2 = 0
很奇怪的是 c_start = 0 c_end = 300000 CLOCKS_PER_SEC = 1000000
我確實是等了大概一分鐘，所以我相信 time 1 是對的。 (53 second)
可是....為什麼用 clock() 卻會給錯誤的結果呢
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