我在网上搜索过但我只找到了一种方法,但是这样它就会以秒为单位而不是几毫秒.
我的代码是：
- #include <stdio.h>
- #include <assert.h>
- #include <time.h>
- int main(void)
- {
- int solucion;
- time_t start,stop;
- clock_t ticks;
- long count;
- time(&start);
- solucion = divisores_it(92000000,2);
- time(&stop);
- printf("Finnished in %f seconds. \n",difftime(stop,start));
- return 0;
- }
解决方法
跨平台的方式是使用ftime.
Windows特定链接：http://msdn.microsoft.com/en-us/library/aa297926(v=vs.60).aspx
以下示例.
- #include <stdio.h>
- #include <sys\timeb.h>
- int main()
- {
- struct timeb start,end;
- int diff;
- int i = 0;
- ftime(&start);
- while(i++ < 999) {
- /* do something which takes some time */
- printf(".");
- }
- ftime(&end);
- diff = (int) (1000.0 * (end.time - start.time)
- + (end.millitm - start.millitm));
- printf("\nOperation took %u milliseconds\n",diff);
- return 0;
- }
我运行上面的代码并使用VS2008跟踪它,并看到它实际上调用了Windows GetSystemTimeAsFileTime函数.
无论如何,ftime会给你几毫秒的精度.
