该程序在TC3.0环境下编译通过，共有9个函数。分别是printScreen，start，leave，levelChoice，newWord，moving，wordHit，result和main。

其功能分别是：

printScreen：刷新屏幕输出的图像。

Start：用户进入程序时选择开始，退出和求助。

Leave：用户离开程序事提示感谢使用

levelChoice：用户开始之前选择等级

newWord：生成一个新的字母并将其置于首行。

moving：将屏幕上的所有字母向下移动一行

wordHit：判断用户是否输入字母，如果输入，且屏幕上有该字母则将该字母所在位置置空。

result：判断该用户的得分，提示其是否进入下一等级。

main：总体控制以上各函数，判断其是否运行。-The program compiled by TC3.0 environment, a total of nine function. Is printScreen, start, leave, levelChoice, newWord, moving, wordHit, result and main. Its features are: printScreen: refresh the screen output image. Start: the user to enter the program, select Start, quit and seek help. Leave: the user leaves the program things prompt thank using levelChoice: before the start of the users to select rating newWord: generate a new letter and placed in the first row. moving: all the letters on the screen down mobile the one line wordHit: to determine whether the user enter the letter, if the input screen of the letter, the letter where the position is set empty. The result: to determine the user' s score, prompted whether to go to the next level. main: overall control of the above functions, to determine whether to run.