大概是输出的时候丢精了吧
by esquigybcu @ 2023-07-09 18:49:18
不要用 == 判断浮点数相等。
by XeCtera @ 2023-07-09 19:00:45
掉精度了，不过应该不影响程序结果，我也没加容错，你的程序问题不出在这
by KnownError_ @ 2023-07-09 19:07:17
@[KnownError_](/user/460457) 那错在哪（
by Xy_top @ 2023-07-09 19:11:33
@[KnownError_](/user/460457) 我改成 fabs (x1 - x2) < 0.1 后还是排序错误。
另外我的程序只有当满足这个规律是才管用
by Xy_top @ 2023-07-09 19:12:44
@[Xy_top](/user/637796) 在看（（
by KnownError_ @ 2023-07-09 19:13:37
@[Xy_top](/user/637796)
```cpp
bool cmp (Node n1, Node n2) {
if (n2.x - n1.x > eps) return true;
if (abs(n1.x - n2.x) < eps){
if (n1.y < n2.y) return true;
return false;
}
return false;
}
```
by KnownError_ @ 2023-07-09 19:14:28