无法输出，求改！！！！！！！HELP!!!!!!!!!

psq15016267011 @ 2024-11-29 16:59:24

#include <bits/stdc++.h>
using namespace std;
const int N=5010;
struct BI{
    int d[N];
    int len;
    void print(){
        for(int i=len-1;i>=0;i--) cout<<d[i];
    }
};
BI operator + (const BI& x,const BI& y){
    BI z;
    int jin=0,len;
    len=max(x.len,y.len);
    for(int i=0;i<len;i++){
        z.d[i]=x.d[i]+y.d[i]+jin;
        jin=z.d[i]/10;
        z.d[i]%=10;
    }
    if(jin) z.d[len++]=jin;
    z.len=len;
    return z;
}
BI a[5010];
int main(){
    int n;
    cin >> n;
    a[1].d[0]=1;
    a[1].len = 1;
    a[2].d[0]=2;
    a[2].len = 1;
    for(int i=3;i<=n;i+1) {
        a[i]=a[i-1]+a[i-2];
    }
    a[n].print();
    return 0;
}

by _czx6666_ @ 2024-11-29 17:12:45

i+1 改i++

by _czx6666_ @ 2024-11-29 17:13:12

@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011@psq15016267011

by psq15016267011 @ 2024-11-29 17:22:19

@czx6666大佬怎么改？

by psq15016267011 @ 2024-11-29 17:24:40

@czx6666过了，谢谢大佬！！！