/* Emits a 7-Hz tone for 10 seconds.
Your PC may not be able to emit a 7-Hz tone. */
#include <dos.h>
int
main(
void
)
{
sound(7);
delay(10000);
nosound();
return
0;
}
by: 发表于:2017-08-23 16:27:01 顶(0) | 踩(0) 回复
??
by: 发表于:2017-08-23 16:27:01 顶(0) | 踩(0) 回复
??
回复评论