conflicing declaration 'std::shared_ptr<int>pc'
时间: 2024-03-04 21:50:23 浏览: 15
这个错误通常出现在你在同一作用域内多次定义了同一个变量名。在你的代码中,你可能在同一作用域内多次使用了变量名 `pc`,并且使用了不同的声明方式,如 `std::shared_ptr<int> pc1` 和 `std::shared_ptr<int> pc2` 这样的形式。要解决这个错误,你需要检查你的代码,在同一作用域内确保只有一个变量使用了同一个名称,并且使用相同的声明方式。你也可以考虑将变量名修改为不同的名字,以避免命名冲突。
相关问题
‘unordered_map’ is not a member of ‘std’ std::unordered_map<int, Client> client;
This error occurs when the compiler is unable to find the declaration of the `unordered_map` class in the `std` namespace.
To fix this error, you need to ensure that you have included the `<unordered_map>` header file in your code. You can add the following line at the top of your file:
```c++
#include <unordered_map>
```
This will include the necessary header file and allow you to use the `std::unordered_map` class in your code.
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq
This is a declaration of a priority queue in C++ that stores pairs of integers. The priority queue is implemented using a min-heap, which means that the smallest element will have the highest priority. The first integer in the pair is the priority and the second integer is the value.
The syntax for declaring a priority queue in C++ is:
priority_queue<data_type, container_type, comparison_function>
In this case, the data type is a pair of integers (pair<int, int>), the container type is a vector (vector<pair<int, int>>), and the comparison function is the default less-than operator (>).
However, in order to implement a min-heap, we need to use the greater-than operator (<) instead. So we pass greater<pair<int, int>> as the comparison function.
Overall, this priority queue will store pairs of integers in ascending order of their first element. If two pairs have the same first element, then they will be ordered based on their second element in ascending order as well.
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