Thread: strange program behaviour...

Code:

#include <stdio.h>
#define WAIT system("sleep 2")

main()
{
 printf("Helllo\n");
 WAIT;
}

The desired program output is as follows:
1)Program prints the "Hello" msg
2)It halts for 2 seconds
3)It finally exits

But if we write something like:

Code:

 printf("Hello");
 WAIT;

(\n character ommited)

then the output changes:the program first halts and
then prints the msg.

Is there anybody out there that happens to know why this happens?