运行时错误 terminate called after throwing an instance of 'std l

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terminate called after throwing an instance of 'std::logic_error' what(): basic_string::_S_construct NULL not valid

主要原因：对一个空指针进行操作。

例如：char* p = NULL:

string str(p);              //运行时报错

           

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terminate called after throwing an instance of 'std::logic_error' what(): basic_string::_S_construct NULL not valid

主要原因：对一个空指针进行操作。

例如：char* p = NULL:

string str(p);              //运行时报错