斐波那契数列(数组)

#include <bits/stdc++.h>
using namespace std;
int sum(int x){
    if(x==1){
        cout<<1<<" ";
    }else if(x==2){
        cout<<1<<" "<<1;
    }else{
        cout<<"1"<<" ";
        int a=1,b=1,c=0;
        for(int i=2;i<=x;i++){
            c=a+b;
            a=b;
            b=c;
            cout<<a<<" ";
        }
    }
}
int main(){
    int x;
    cin>>x;
    sum(x);
    return 0;
}