过辣！（脑残人士的欢呼）

    int a[10],b[10],maxa=-114514,maxb=-114514,mina=114514,minb=114514;
    for (int i=1;i<=4;i++)
    {
        cin>>a[i];
        cin>>b[i];
        if (a[i]>maxa)
        {
            maxa=a[i];
        }
        if (a[i]<mina)
        {
            mina=a[i];
        }
        if (b[i]>maxb)
        {
            maxb=b[i];
        }
        if (b[i]<minb)
        {
            minb=b[i];
        }
    }
    cout<<(maxa-mina)*(maxb-minb);

不AC我吃💩

#include <bits/stdc++.h>
using namespace std;
int a[10],b[10],i,x,y;
int main(){
	for(i=1;i<=4;i++)cin>>a[i]>>b[i];
	if(a[1]==a[2])x=abs(b[1]-b[2]);
    else if(a[1]==a[3])x=abs(b[1]-b[3]);
    else if(a[1]==a[4])x=abs(b[1]-b[4]);
	if(b[1]==b[2])y=abs(a[1]-a[2]);
    else if(b[1]==b[3])y=abs(a[1]-a[3]);
    else if(b[1]==b[4])y=abs(a[1]-a[4]);
	cout<<x*y<<endl;
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int a[10],b[10],i,x,y;
int main()
{
	for(i = 1; i <= 4; i++)
    {
		cin>>a[i]>>b[i];
	}
	if(a[1] == a[2]) 
    {
		x = abs(b[1] - b[2]);
	} 
    else if(a[1] == a[3]) 
    {
		x = abs(b[1] - b[3]);
	}
    else if(a[1] == a[4]) 
    {
		x = abs(b[1] - b[4]);
	}
	if(b[1] == b[2]) 
    {
		y = abs(a[1] - a[2]);
	} 
    else if(b[1] == b[3]) 
    {
		y = abs(a[1] - a[3]);
	} 
    else if(b[1] == b[4]) 
    {
		y = abs(a[1] - a[4]);
	}
	cout<<x * y <<endl;
    return 0;
}