猜数字游戏：在文本框中输入一个数字，程序会自动判定所输入数字是否是系统默认数字，如果不是将会提示所输入数字是过大还是过小-Number guessing game: in the text box enter a number, the program will automatically determine whether the number entered is the default number, if not you will be prompted by the input num