C ++ Linux编译错误

Question

I am getting following error while compiling in linux.

file.cxx:283:9: error: reference to ‘multimap’ is ambiguous
file.cxx:273:47: error: candidates are: std::multimap, std::basic_string > multimap

->piece of sample code is

static std::multimap<std::string,std::string> multimap;   //line no. 273
//
void foo()
{
    if (multimap.size() == 0)
    {
        multimap.insert( std::pair< std::string, std::string >( "A" , "B" ) );
    }
}

Thanks in advance

Answer 1

You probably have using namespace std; in the file. That means your compiler already knows "multimap", which you are trying to define again, in which case the compiler doesn't know which one you mean.

Answer 2

There is a member function in std and you inserted it into your namespace. Avoid using using namespace std; you can import what you need this way:

using std::multimap;

using std::string;