/* 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
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by: 发表于:2017-08-23 16:27:01 顶(0) | 踩(0) 回复
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