使用MASM调试 响铃设计：为掌握响铃的使用方法，编写程序，从键盘接收输入字符，如是数字N，则响铃N次；如不是数字，则不响。-MASM debug the design using ringing: ringing for mastering the use of methods, the preparation process, from the keyboard to receive input characters, so the number N, the ring N times