hdu2070 Fibbonacci Number

Problem Description

Your objective for this question is to develop a program which will generate a fibbonacci number. The fibbonacci function is defined as such:

f(0) = 0
f(1) = 1
f(n) = f(n-1) + f(n-2)

Your program should be able to handle values of n in the range 0 to 50.

 

Input

Each test case consists of one integer n in a single line where 0≤n≤50. The input is terminated by -1.

 

Output

Print out the answer in a single line for each test case.

 

Sample Input

3 4 5 -1

 

Sample Output

2 3 5

Hint

Note:

you can use 64bit integer: __int64

源代碼：

#include<stdio.h> #include<string.h> int main() {     __int64 a[100];     int n,i;     while(scanf("%d",&n)&&n!=-1)     {     memset(a,0,sizeof(a));     a[0]=0;a[1]=1;     for(i=2;i<=n;i++)     a[i]=a[i-1]+a[i-2];     printf("%I64d\n",a[n]);     }     return 0; }