windows.h Sleep()函数

[bianchunlei]

下面代码哪出问题了？
#include <time.h>
#include <stdio.h>
#include <windows.h>

int main(void)
{
clock_t start, end;
start = clock();

Sleep(20);

end = clock();
printf("The time was: %f\n", (end - start) / CLK_TCK);

return 0;
}

[jackyjkchen]

((double)end - (double)start) / CLK_TCK
整数除法只会取整

[ljhhh0123]

#include <time.h>  
#include <stdio.h>   
#include <windows.h>

int main(void)  
{  
clock_t start, end;  
start = clock();  

Sleep(20);  

end = clock();  
printf("The time was: %f\n",(double) (end - start) / CLK_TCK);  

return 0;  
}

[jernymy]

[Quote=引用 1 楼 jackyjkchen 的回复:]
((double)end - (double)start) / CLK_TCK
整数除法只会取整
[/Quote]
++

[bianchunlei]

CLK_TCK这个是什么？