我用的dev-c提示没有sleep函数，所以在网上找了个，但是太高端我不知道怎么用，请问大虾们怎么样。。。

[小妮子驾到]

//  --------------------------------------------------------------------------
//  Sleep for a number of milliseconds

void zclock_sleep(int msecs){
#if defined (__UNIX__)
	struct timespec t;
	t.tv_sec  =  msecs / 1000;
	t.tv_nsec = (msecs % 1000) * 1000000;
	nanosleep (&t, NULL);
#elif ()
	//  Windows XP/2000:  A value of zero causes the thread to relinquish the
	//  remainder of its time slice to any other thread of equal priority that is
	//  ready to run. If there are no other threads of equal priority ready to run,
	//  the function returns immediately, and the thread continues execution. This
	//  behavior changed starting with Windows Server 2003.
#   if defined (NTDDI_VERSION) && defined (NTDDI_WS03) && (NTDDI_VERSION >= NTDDI_WS03)
	Sleep (msecs);
#   else
	if (msecs > 0)
		Sleep (msecs);
#   endif
#endif
}
上面这段函数是网上找的实现sleep
我用google翻译注释的内容为
//Windows XP/2000：零值会导致线程放弃 它的时间
//余数为相同优先级的其他线程
//准备运行。如果有相同优先级的就绪运行没有其他线程， 
//该函数立即返回，线程继续执行。这 
//行为改变开始与Windows Server 2003。
#if defined (__UNIX__) 
判断UNIX
#    if defined (NTDDI_VERSION) && defined (NTDDI_WS03) && (NTDDI_VERSION >= NTDDI_WS03)
判断WIN?
__UNIX__   NTDDI_VERSION       NTDDI_WS03
这3个我应该去定义为什么  
我是新手刚请各位大虾帮帮

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main( void )
{
 printf("sleep的效果");
 zclock_sleep(5000);//5秒
 system("pause");
 
 return 0;
    
}  

//  --------------------------------------------------------------------------
//  Sleep for a number of milliseconds

void zclock_sleep(int msecs){
#if defined (__UNIX__)
	struct timespec t;
	t.tv_sec  =  msecs / 1000;
	t.tv_nsec = (msecs % 1000) * 1000000;
	nanosleep (&t, NULL);
#elif ()
	//  Windows XP/2000:  A value of zero causes the thread to relinquish the
	//  remainder of its time slice to any other thread of equal priority that is
	//  ready to run. If there are no other threads of equal priority ready to run,
	//  the function returns immediately, and the thread continues execution. This
	//  behavior changed starting with Windows Server 2003.
#   if defined (NTDDI_VERSION) && defined (NTDDI_WS03) && (NTDDI_VERSION >= NTDDI_WS03)
	Sleep (msecs);
#   else
	if (msecs > 0)
		Sleep (msecs);
#   endif
#endif
}

[赵4老师]

#ifdef WIN32
#include <windows.h>
void sleep_ms(int ms) {
    Sleep(ms);
}
#else
#include <unistd.h>
void sleep_ms(int ms) {
    usleep(ms*1000);
}
#endif

[JiMoKuangXiangQu]

不用这么复杂吧，简单调用_sleep()就可以了。

[小妮子驾到]

引用 1 楼 zhao4zhong1 的回复:

#ifdef WIN32
#include <windows.h>
void sleep_ms(int ms) {
    Sleep(ms);
}
#else
#include <unistd.h>
void sleep_ms(int ms) {
    usleep(ms*1000);
}
#endif

谢谢赵老师

[小妮子驾到]

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


//#define WIN32  
我这里还有个一问题如果加了这句我定义为WIN 才会进入
#ifdef WIN32
#include <windows.h>
void sleep_ms(int ms) {
     printf("你进入的是win");
    Sleep(ms);// Sleep以毫秒为单位
}
但是我定义了后DEV-C++会出现
sleep.c [Warning] "WIN32" redefined 
<built-in> [Warning] this is the location of the previous definition 
的提示




void sleep_ms(int ms);
int main( void )
{
 sleep_ms(5000);
 printf("LOOK");

 system("pause");
 
 return 0;
    
}  

#ifdef WIN32
#include <windows.h>
void sleep_ms(int ms) {
     printf("你进入的是win");
    Sleep(ms);// Sleep以毫秒为单位
}
#else
#include <unistd.h>
void sleep_ms(int ms) {
     printf("你进入的是linux");
    usleep(ms*1000);//usleep单位是微秒us*1000毫秒 
}
#endif

[小妮子驾到]

#define WIN32 #ifdef WIN32 如果定义了 WIN32 就。。。 。。。 #else 没有的话就。。。 。。。。 #endif 为什么我#define WIN32 会有那样的提示 而不定义就没有问题呢