int?main()?{
int?x,y;
printf("輸入2個整數(空格隔開,q退出):\n");
while(scanf("%d%d",&x,&y)?==?2)?{
if(x?==?0)?{
if(y?==?0)?printf("(0,0)在坐標原點\n");
else?if(y?>?0)?printf("(0,%d)在Y上半軸上\n",y);
else?printf("(0,%d)在Y下半軸上\n",y);
}
else?if(x?<?0)?{
if(y?<?0)?printf("(%d,%d)在第三象限\n",x,y);
else?if(y?==?0)?printf("(%d,0)在X左半軸上\n",x);
else?printf("(%d,0)在第二象限\n",x);
}
else?{
if(y?<?0)?printf("(%d,%d)在第四象限\n",x,y);
else?if(y?==?0)?printf("(%d,0)在X左半軸上\n",x);
else?printf("(%d,%d)在第壹象限\n",x,y);
}
printf("輸入2個整數(空格隔開,q退出):\n");
}
return?0;
}