View Code of Problem 23

#include<stdio.h>
#include<stdlib.h>
int main()
{
int d,a[100],i;
a[1]=1;a[2]=2;
for(i=3;i<100;i++)
a[i]=a[i-1]+a[i-2];
while(scanf("%d",&d)!=EOF,d)
{
printf("%lld\n",a[d]);
}}