这是一个打字计时练习的程序,在缓冲区中预放了一些字母,运行时,可按照屏幕上 显示的字母输入练习,每输入完一行按回车键后,可显示出练习输入的时间.-This is a time to practice typing procedures, pre-amplifier in the buffer zone in a number of letters, run-time can be displayed on the screen in