ISO C ++禁止声明没有类型的'multimap'

There seems to be a problem in the way that I am declaring my multimap:

我声明我的multimap的方式似乎有问题:

std::multimap<int, std::string> table;

I keep getting the following error message and am quite stuck on how to solve this!

我一直收到以下错误消息,我很坚持如何解决这个问题!

error: ISO C++ forbids declaration of ‘multimap’ with no type
error: invalid use of ‘::’
error: expected ‘;’ before ‘<’ token

This is my first time trying multimap in C++, and I'm sorry if this seems a trivial problem. Could someone please point me in the right direction?

这是我第一次在C ++中尝试多图,如果这看起来像是一个小问题,我很抱歉。有人可以指出我正确的方向吗?

In my central.h I have the following code

在我的central.h中,我有以下代码

class Central{
  private:
  int address;
  std::multimap<int, std::string> table;

public:
  Central(int _address);

In central.cpp:

#include <iostream>
#include <string>
#include <sstream>
#include <map>

using namespace std;

#include "central.h"

Central::Central(int _address)
{
    address = _address;         
}

Thank you for your time! :)

感谢您的时间! :)

1 个解决方案

#1

You haven't #included <map>. That's why the compiler thinks that multimap is a variable rather than a type.

你还没有#included