C++ 未知覆盖说明符，缺少类型说明符
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Unknown override specifier, missing type specifier
提问by vilequarter
First, Parameter.h:
首先，Parameter.h：
#pragma once
#include <string>
class Parameter {
public:
Parameter();
~Parameter();
private:
string constValue;
string varName;
};
And Parameter.cpp:
并且Parameter.cpp：
#include "Parameter.h"
using namespace std;
Parameter::Parameter() {};
Parameter::~Parameter() {};
I've brought these two files down to the barest of bones to get the errors that seem to be popping up. At the two private declarations for strings, I get the two errors:
我已经把这两个文件带到了最简单的地方，以获取似乎突然出现的错误。在strings的两个私有声明中，我收到两个错误：
'constValue': unknown override specifier
missing type specifier - int assumed. Note: C++ does not support default-int
I've seen several questions with these errors, but each refers to circular or missing references. As I've stripped it down to what's absolutely required, I can see no circular references or references that are missing.
我已经看到了几个关于这些错误的问题，但每个问题都指的是循环引用或缺失引用。由于我已将其精简为绝对需要的内容，因此我看不到任何循环引用或缺少的引用。
Any ideas?
有任何想法吗？
采纳答案by Tas
As @Pete Becker points out in the comments, you need to qualify the name stringas std::string:
正如@Pete Becker 在评论中指出的那样，您需要将名称限定string为std::string：
private:
std::string constValue;
std::string varName;
The compiler just doesn't know what you're talking about, and it's the equivalent of just writing:
编译器只是不知道你在说什么，这相当于只写：
SomeGreatType myMagicalUniversalType
The compiler just doesn't know what type that is unless you've declared, hence the error
除非你已经声明，否则编译器不知道这是什么类型，因此错误
missing type specifier - int assumed
缺少类型说明符 - 假设为 int
You should read up about why you should avoid using namespace std;.
你应该阅读为什么你应该避免using namespace std;.
With regards to your question in the comments:
关于您在评论中的问题：
In all the (working) classes I've written, I've never put in the std::, instead relying on the using namespace std; in the .cpp file. Why would this one be any different?
在我编写的所有（工作）类中，我从未放入 std::，而是依赖 using 命名空间 std; 在 .cpp 文件中。为什么这个会有所不同？
I can only infer that at some point before including "Parameter.h" that you had a using namespace std. E.g.:
我只能推断在包含“Parameter.h”之前的某个时候你有一个using namespace std. 例如：
// SomeType.h
#using namespace std
...
// Parameter.cpp
#include "SomeType.h"
#include "Parameter.h"
The compiler compiles things top-to-bottom, and including essentially just replaces the #includewith the contents of that file
编译器从上到下编译东西，包括基本上只是用该#include文件的内容替换
