C Exercise Example 11
100 cases of classic C language
Title: Classical problem (rabbit born cub): a pair of rabbits from the first 3 months after birth monthly birth to a rabbit, a small rabbit to the first three months after the month long again with one pair of rabbits, if rabbits do not die, the total number of rabbits per month to ask how much? (Output of the previous 40 months can be)
Program analysis: number of rabbits column 1,1,2,3,5,8,13,21 law .... that is the next month and two months (from the first three months).
Source Code:
// Created by www.w3big.com on 15/11/9.
// Copyright © 2015年 本教程. All rights reserved.
//
#include<stdio.h>
int main()
{
int f1=1,f2=1,i;
for(i=1;i<=20;i++)
{
printf("%12d%12d",f1,f2);
if(i%2==0) printf("\n");
f1=f1+f2;
f2=f1+f2;
}
return 0;
}
The above example output is:
1 1 2 3
5 8 13 21
34 55 89 144
233 377 610 987
1597 2584 4181 6765
10946 17711 28657 46368
75025 121393 196418 317811
514229 832040 1346269 2178309
3524578 5702887 9227465 14930352
24157817 39088169 63245986 102334155