C++ 如何避免错误：在抛出 'std::logic_error' what() 实例后调用终止：basic_string::_S_construct null not valid
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How to avoid the error: terminate called after throwing an instance of 'std::logic_error' what(): basic_string::_S_construct null not valid
提问by Czon
if(player!=NULL)
player->shuffled();
I do such things to avoid passing a null reference to a string constructor, but when compiling it still comes to error.
我这样做是为了避免将空引用传递给字符串构造函数，但是在编译时它仍然会出错。
回答by Dave S
Somewhere, somehow, you're calling the std::stringconstructor with the const char*value NULL.
在某处，不知何故，您正在std::string使用const char*值 NULL调用构造函数。
To avoid the problem. Don't do that.
以免出现问题。不要那样做。
