错误:数值常量前应有预期的unqualid-id [英] error: expected unqualified-id before numeric constant

问题描述

我在.h文件中定义所有常量.

之前是

Hi,

I am defining all constants in a .h file.

Earlier it were

#defines

.我将其替换为

const

.

头文件看起来像

.

Header file looks like

namespace preprocessing
{
    namespace generaldef
     {
          const int BASE = 0;
     }
}

对于此代码，我得到以下错误

错误:数字常量前应有预期的unqualid-id |

对于行

for this code i am getting the following error

error: expected unqualified-id before numeric constant|

for the line

const int BASE = 0;

推荐答案

以下程序:

The following program:

// foo.h
namespace preprocessing
{
    namespace generaldef
     {
          const int BASE = 0;
     }
}

// foo.cpp
#include "foo.h"
#include <iostream>

using namespace std;
int main()
{
  cout << preprocessing::generaldef::BASE << endl;
}

使用gcc版本4.4.5可以正常编译(并运行！).


顺便说一句，为什么不使用enum?

Compiles (and runs!) fine with gcc version 4.4.5.


By the way, why don''t you use an enum?

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