Question

急求一个c语言程序 有题目 有50行左右

最好用到if语句

Answer 1

从前有一对兔子，它们每一个月生一对兔子，新生的小兔子
两个月就张大了，在第二个月的月底开始生它们的下一代小兔子，这样一代一代生下去，求解兔子的增长数量的数列。

#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();
}