淦，代码炸了
```cpp
#include<iostream>
#include<cstdlib>
using namespace std;
struct Point{
int x,y;
friend Point operator +(Point a,Point b){
Point tmp;
tmp.x=a.x+b.x;
tmp.y=a.y+b.y;
return tmp;
}
friend Point operator -(Point a,Point b){
Point tmp;
tmp.x=a.x-b.x;
tmp.y=a.y-b.y;
return tmp;
}
friend int operator *(Point a,Point b){
return a.x*b.x+a.y+b.y;
}
friend bool operator ==(Point a,Point b){
return (a.x==b.x&&a.y==b.y);
}
friend ostream& operator<<(ostream &a,Point b){
cout<<b.x<<" "<<b.y;
}
friend int cross(Point a,Point b){
return a.x*b.y-a.y*b.x;
}
friend double cross(Point a,Point b,Point c){
return cross((c-a),(c-b));
}
};
Point p[5];
void init_(){
for(int i=1;i<=4;i++){
cin.ignore();
cin>>p[i].x;
cin.ignore();
cin>>p[i].y;
cin.ignore();
cin.ignore();
//cout<<p[i];
}
for(int i=1;i<=3;i++){
if(p[4]==p[i]){
cout<<4;
exit(0);
}
}
}
int main(){
init_();
int a=cross(p[1],p[2],p[4]),b=cross(p[2],p[3],p[4]),c=cross(p[3],p[1],p[4]);
//cout<<a<<" "<<" "<<b<<" "<<c;
if((a>0&&b>0&&c>0)||(a<0&&b<0&&c<0)){
cout<<1;
}else if((a==0&&(p[4]-p[1])*(p[4]-p[2])<0)||b==0&&(p[4]-p[2])*(p[4]-p[3])<0||c==0&&(p[4]-p[3])*(p[4]-p[1])<0){
cout<<3;
}else{
cout<<2;
}
}
```
by tamamocross @ 2023-05-21 11:01:16
@[zhzkiller](/user/764944)
您发的东西看不见
by tamamocross @ 2023-05-21 11:15:17
@[tamamocross](/user/754444)
注意整齐
by Patrick_Liu_Bingxian @ 2023-05-21 11:24:17
@[Patrick_Liu_Bingxian](/user/915569)
后面补了
by tamamocross @ 2023-05-21 11:33:28