类方法和变量具有相同的名称，编译错误在C ++不是在Java？ [英] Class method and variable with same name, compile error in C++ not in Java?

问题描述

class Test {

      bool isVal() const {
          return isVal;
      }

  private:

      bool isVal;
};

在编译此文件时，会显示

On Compiling this file it says

testClass.cpp：9：声明`bool
Test :: isVal'

testClass.cpp:9: declaration of `bool Test::isVal'

testClass.cpp：3： b $ b前声明`bool
Test :: isVal（）'

testClass.cpp:3: conflicts with previous declaration `bool Test::isVal()'

p>

Although the same would work for java

class Test {

  private boolean isVal;

  public boolean isVal() {
      return isVal;
  }

}

不知道为什么C ++无法处理。

Not sure why C++ cannot handle this.

推荐答案

因为C ++不是Java。您可以输入会员的地址：

Because C++ is not Java. You can take the address of a member:

&Test::isVal

所以你不能有两个成员有相同的名字，除了你可以重载成员函数。即使你可以通过某种方式消除歧义，下一个问题已经出现在其他地方。

So you can't have two members have the same name, except that you can overload member functions. Even if you could disambiguate that by some kind of cast, the next problem would already arise at other places.

在C ++中，很多人包括我通常会特别调用数据成员，例如在他们的名字前加上 m 。这避免了问题：

In C++, a lot of people including me usually call data members specially, like putting a m before their name. This avoids the problem:

class Test {
public:
    bool IsVal() const { return mIsVal; }
private:
    bool mIsVal;
};

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