一个彩票程序：30选7。随机（1~30之间）生成7个随机数，然后从键盘输入7个数，对比7个数是否与随机数有相同的。最后显示“中了几个号”。同时，如果中了7个号，显示一等奖；如果中了6个号，显示二等奖；如果中了5个号，显示三等奖。-A lottery program: 30 select 7. Random (between 1 to 30) to generate seven random numbers, and then enter the number 7 from the keyboard, compared to seven the number of random numbers are the same. Last Show　in a few numbers.　Also, if in the seven numbers, display the first prize　If in the six numbers, display the second prize　If in the 5 numbers displayed prize.