C++ 代码

#include<cstdio>
#include<iostream>

using namespace std;

int main(void)
{
    int i,n,sum,x = 0,y = 1;
    cin >> n;
    for(i=1;i<=n;i++)
    {
        if(i<3) printf("%d ",i-1);
        else{
            sum = x + y;
            printf("%d ",sum);
            if(i%2!=0) x = sum;
            else y = sum;
        }
    }
    return 0;
}