不知道哪错了，请看一下

Question

#include <iostream>
#include<string.h>
using namespace std;
class Car{
    public:
    void opengate(){
        strcpy(gate,"ON");
    }
    void closegate(){
        strcpy(gate,"OFF");
    }
    void openlight(){
        strcpy(bull,"ON");
    }
    void closelight(){
        strcpy(bull,"OFF");
    }
    void plus(){
        speed+=10;
    }
    void div(){
        speed-=10;
    }
    void printfInfo(){
        cout<<"车门"<<" "<<gate<<endl;
        cout<<"车灯"<<" "<<bull<<endl;
        cout<<"速度"<<" "<<speed<<endl; 
    }
    char gate[20];
    char bull[20];
    int speed;
    
};

int main()
{   
    Car car;
    strcpy(car.gate,"OFF");
    strcpy(car.bull,"OFF");
    car.speed=0;
    char a[20];
    cin>>a;
    for(int i=0;i<20;i++){
        if(a[i]==1){
            car.opengate();
        }
        if(a[i]==2){
            car.closegate();
        }
        if(a[i]==3){
            car.openlight();
        }
        if(a[i]==4){
            car.closelight();
        }
        if(a[i]==5){
            car.plus();
        }
        if(a[i]==6){
            car.div();
        }
        else
        break;
    }
    car.printfInfo();
    return 0;
    
}

Answer 1

一个else只能对应一个if，所以除了最后一个else和第一个if，其他的都改成else if