相关疑难解决方法(0)

我有:

unsigned char *foo();
std::string str;
str.append(static_cast<const char*>(foo()));

错误: invalid static_cast from type ‘unsigned char*’ to type ‘const char*’

在C++风格中投射的正确方法是什么？

sqlite3_column_text返回一个const unsigned char*,如何将其转换为std :: string？我试过std :: string(),但是我收到了一个错误.

码:

temp_doc.uuid = std::string(sqlite3_column_text(this->stmts.read_documents, 0));

错误:

1>.\storage_manager.cpp(109) : error C2440: '<function-style-cast>' : cannot convert from 'const unsigned char *' to 'std::string'
1>        No constructor could take the source type, or constructor overload resolution was ambiguous

我有unsigned char*,想把它转换成std::string.你能告诉我最安全的方法吗？