程序1】 

题目：古典问题：有一对兔子，从出生后第3个月起每个月都生一对兔子，小兔子长到第三个月        后每个月又生一对兔子，假如兔子都不死，问每个月的兔子总数为多少？  1.程序分析：  兔子的规律为数列1,1,2,3,5,8,13,21....  2.程序源代码：  main()  {  long  f1,f2   int  i   f1=f2=1  

for(i=1 i<=20 i++) 

  {  printf(" 12ld  12ld",f1,f2)  

      if(i 2==0)  printf("\n") /*控制输出，每行四个*/        f1=f1+f2   /*前两个月加起来赋值给第三个月*/        f2=f1+f2   /*前两个月加起来赋值给第三个月*/    }  } 

-Program 1] Topic: classical problem: a pair of rabbits, from the first three months after birth month, a pair of rabbits are born, grow a small rabbit to the first month and three months after the birth of a pair rabbit, hare, if not death, the total number of rabbits asked how much per month? 1 Program analysis: the law of the rabbit number of columns 1,1,2,3,5,8,13,21 .... 2 source code:. Main () {longf1, f2　 inti　f1 = f2 = 1　for (i = 1　i < = 20　i++) {printf ("　 12ld　12ld" , f1, f2)　if (i　2 == 0) printf (" \ n" )　/* Control output per line four*/f1 = f1+f2　/* add up to two months before the assignment to a third Month*/f2 = f1+f2　/* two months before the first three months of assignment to add* /}} =============== ======================