在Linux當中，應用程式，計算執行時間的範例程式

這個範例，計算單位為 microSecond(10^-6)

#include <time.h>

 

clock_t start, end;

double cpu_time_used;

 

 

printf("** Start to measure time **\n");

start = clock();

...

...

...

end = clock();

cpu_time_used = ((double) (end - start))*1000000 / (CLOCKS_PER_SEC);

printf("** execution time:%f microseconds\n", cpu_time_used);

printf("** End of measure time **\n");