VB利用PC喇叭播放声音，PC喇叭一般是指蜂鸣器，程序界面如示，点击窗口内的数字，机箱内的蜂鸣器就会发声，虽然不能模仿出人声，但至少每个数字对应的声音是不同的。-VB using the PC speaker to play a sound, PC speakers generally refers to the buzzer, program interface, as shown, click on the numbers within the window, the buzzer will

24点内简易计算器的实现。中缀表达式变为后缀表达式然后求值-Simple calculator within the 24-point implementation. Infix expression into postfix expression is then uated