猜数字小游戏，用按钮，文本框，标签实现，按按钮产生一个随机数，将你猜的数输入文本框，按答案，可显示随机数是什么，按确认会判断你猜 的对错-Number guessing game, with buttons, text boxes, labels, press the button to generate a random number, would you guess the number of input text box to display random number, confirmation will judge you guess right or wrong answers