#include <iostream>
using namespace std;
void main ()
{
float x,y;
cout<<"請輸入橫坐標"<<endl;
cin>>x;
cout<<"請輸入縱坐標"<<endl;? //cout打成了cou
cin>>y;
if(x==0)
{
if(y==0)
?cout<<"坐標軸原點上"<<endl;
else if(y>0)
cout<<"y軸正半軸上"<<endl;else
cout<<"y軸負半軸上"<<endl;
}
else if(x>0)
{
?if(y==0)
cout<<"x軸正半軸上"<<endl;
else if(y>0)cout<<"第壹象限上"<<endl;
else cout<<"第四象限上"<<endl; } else if(y==0) ?//這個地方多了壹個{,已刪除cout<<"x軸負半軸上"<<endl;
else if(y>0)
cout<<"第二象限上"<<endl;else
cout<<"第三象限上"<<endl;}
運行結果如圖：