Windows和linux下clock函数

windows:  Calculates the wall-clock time used by the calling process. return:The elapsed wall-clock time since the start of the process

Linux:The clock() function returns an approximation of processor time used by the program

 

Windows：

 

 1 #include <stdio.h>
 2 #include <time.h>
 3 #include <windows.h>
 4 
 5 int main()
 6 {
 7     printf("The start clock is: %ld\n", clock());
 8     Sleep(2000);
 9     printf("The end clock is: %ld\n", clock());
10 
11     return 0;
12 }

Linux：

 

 1 #include <stdio.h>
 2 #include <time.h>
 3 #include <unistd.h>
 4 
 5 int main()
 6 {
 7         printf("The start clock is: %ld\n", clock());
 8         sleep(2);
 9         printf("The end clock is: %ld\n", clock());
10 
11         return 0;
12 }

 

 

 

运行的结果：

Windows：

The start clock is: 1  

The end clock is: 2001  

Linux：

The start clock is: 0  

The end clock is: 0  

 

参考：

http://blog.csdn.net/lxmky/article/details/7026986

http://msdn.microsoft.com/en-us/library/aa272059(v=vs.60).aspx

man clock