这个是数学上非常有名的菲波那契数列，对于初学VC的人来说是个很有意思的小程序，一对兔子出生二个月后，每个月会生一对小兔子，小兔子从第二个月起也可以生一对新的小兔子，N个月后，共有多少对兔子？程序对学生成绩进行统计，并输出各科平均成绩。-This is mathematically very famous Fibonacci series, VC for the beginner is a very interesting small programs, a pair of rabbits two months after the birth, every month can have a pair of small rabbit, rabbit from second months can also have a new pair of rabbit, N months after how many rabbits, right? Procedures for student performance statistics, and output grade average.