(40 classic java algorithms
[procedure 1] title: classical question: there is a pair of rabbits. From the third month after birth, a pair of rabbits are born every month. After the little rabbit grows to the fourth month, a pair of rabbits are born every month. If the rabbits do not die, how many rabbits are there in each month?
1. program analysis: the rule of rabbits is the sequence 1,1,2,3,5,8,13,21)