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The sleep() method in the C programming language allows you to wait for just a current thread for a set amount of time. The sleep() function will sleep the present executable for the time specified by the thread. Presumably, the CPU and other operations will function normally.
Answer: The header for sleep is “unistd. h” for LINUX/UNIX Operating system and “Windows. h” for the Windows Operating system.
The delay() function is built upon a C library function called clock(). The clock() function returns a time value in clock ticks, which is based on the processor's speed. The value returned is of the clock_t variable type. You can use subsequent reads of the clock() function to determine elapsed time.
Use:
#include <windows.h>
Sleep(sometime_in_millisecs); // Note uppercase S
And here's a small example that compiles with MinGW and does what it says on the tin:
#include <windows.h>
#include <stdio.h>
int main() {
printf( "starting to sleep...\n" );
Sleep(3000); // Sleep three seconds
printf("sleep ended\n");
}
SleepEx function (see http://msdn.microsoft.com/en-us/library/ms686307.aspx) is the best choise if your program directly or indirectly creates windows (for example use some COM objects). In the simples cases you can also use Sleep.
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