103.兔子产子（菲波那契数列）

  

   

    

     

    
    

     

      #include<stdio.h>
     
    
   

    

     

    
    

     

      void main()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
   int n,i,j,un1,un2,un;
     
    
   

    

     

    
    

     
   clrscr();
     
    
   

    

     

    
    

     
   puts("********************************************************");
     
    
   

    

     

    
    

     
   puts("* This is a program to Calculate Rabbits Numbers. *");
     
    
   

    

     

    
    

     
   puts("* There is a rabbit couple procreats 2 rabbits 1 month,*");
     
    
   

    

     

    
    

     
   puts("* and the young rabbits group and can procreats in the *");
     
    
   

    

     

    
    

     
   puts("* end of the second month. In this way,how many rabbits*");
     
    
   

    

     

    
    

     
   puts("* are there after n generations? *");
     
    
   

    

     

    
    

     
   puts("********************************************************");
     
    
   

    

     

    
    

     
   for(n=2;n<3;)
     
    
   

    

     

    
    

     

         {
     
    
   

    

     

    
    

     
      printf(" >> Please input number of generations (n>2): ");
     
    
   

    

     

    
    

     
      scanf("%d",&n);
     
    
   

    

     

    
    

     
      if(n<3) printf("\n >> Input error!\n");     /*控制输入正确的N值*/
     
    
   

    

     

    
    

     

         }
     
    
   

    

     

    
    

     

         un=un2=1;
     
    
   

    

     

    
    

     
   printf(" >> The numbers of rabbits in first %d generation are as follows:\n",n);
     
    
   

    

     

    
    

     
   printf(" l\t l\t");
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
   for(i=3,j=0;i<=n;i++)
     
    
   

    

     

    
    

     

         {
     
    
   

    

     

    
    

     

            un1=un2;
     
    
   

    

     

    
    

     

            un2=un;
     
    
   

    

     

    
    

     

            un=un1+un2;      /*利用通项公式求解N项的值*/
     
    
   

    

     

    
    

     
      printf(   i%8?" %d\t":"%d\n",un);
     
    
   

    

     

    
    

     

         }
     
    
   

    

     

    
    

     
   printf("\n");
     
    
   

    

     

    
    

     
   printf("\n Press any key to quit...");
     
    
   

    

     

    
    

     
   getch();
     
    
   

    

     

    
    

     

      }
     
    
  
 

文章来源: blog.csdn.net，作者：程序员编程指南，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/weixin_41055260/article/details/124558630