```cpp
int ru2(int y)
{
if(a[y]==y)
{
return y;
}
else
{
a[y]=ru2(a[y]);
}
}
```
改成
```cpp
int ru2(int y)
{
if(a[y]==y)
{
return y;
}
else
{
return a[y]=ru2(a[y]);
}
}
```
by Zxx200611 @ 2020-03-03 20:45:42
你的ru2没返回值
by Kinandra @ 2020-03-03 20:46:05
2l说得对
by Kinandra @ 2020-03-03 20:46:21
谢谢大佬们!!
(真心感谢,改了一晚上了)
by lzqy_ @ 2020-03-03 20:47:16