小小的蒟蒻，大大的？ 风神瞳怎默写 求大佬改

#include<bits/stdc++.h>
using namespace std;
int o1(int x1,int y1,int x2,int y2){
    if(x1==x2||y1==y2){
        cout<<"Yes"; 
        return 1;
    }
    cout<<"No";
    return 0;
}
int o2(int x1,int y1,int x2,int y2){
    if((x1==x2&&(y1-1!=y2||y1+1!=y2))||(y1==y2&&(x1-1!=x2&&x1+1!=x2))){
        cout<<"Yes"; 
        return 1;
    }
    cout<<"No";
    return 0;
}
int o3(int x1,int y1,int x2,int y2){
    if((x1+2==x2&&y1+1==y2)||(x1+2==x2&&y1-1==y2)||(x1-2==x2&&y1+1==y2)||(x1-2==x2&&y1-1==y2)||(x1+1==x2&&y1+2==y2)||(x1+1==x2&&y1-2==y2)||(x1-1==x2&&y1+2==y2)||(x1-1==x2&&y1-2==y2)){
        cout<<"Yes"; 
        return 1;
    }
    cout<<"No";
    return 0;
}
int o4(int x1,int y1,int x2,int y2){
    if((x1+2==x2&&y1+2==y2)||(x1-2==x2&&y1+2==y2)||(x1+2==x2&&y1-2==y2)||(x1-2==x2&&y1-2==y2)){
        cout<<"Yes"; 
        return 1;
    }
    cout<<"No";
    return 0;
}
int main(){
    int p,a,b,c,d;
    cin>>p>>a>>b>>c>>d;
    switch(p){
        case 1:o1(a,b,c,d);break;
        case 2:o2(a,b,c,d);break;
        case 3:o3(a,b,c,d);break;
        case 4:o4(a,b,c,d);break;
    }
    return 0; 
}