在 C++ 标头中声明数组并在 cpp 文件中定义它?
这可能是一件非常简单的事情,但我是 C++ 新手,所以需要帮助.
This is probably a really simple thing but I'm new to C++ so need help.
我只想在我的 C++ 头文件中声明一个数组,例如:
I just want to declare an array in my C++ header file like:
int lettersArr[26];
然后在 cpp 文件中的函数中定义它,例如:
and then define it in a function in the cpp file like:
lettersArr[26] = { letA, letB, letC, letD, letE, letF, letG, letH,
letI, letJ, letK, letL, letM, letN, letO, letP, letQ, letR, letS,
letT, letU, letV, letW, letX, letY, letZ };
但这不起作用.
是我的语法错误还是什么?正确的方法是什么?
Have I got the syntax wrong or something? What is the correct way to to this?
非常感谢.
推荐答案
在头文件的声明中添加extern
.
Add extern
to the declaration in the header file.
extern int lettersArr[26];
(另外,除非您打算更改数组,否则请考虑添加 const
.)
(Also, unless you plan to change the array, consider also adding const
.)
定义必须有类型.添加int
(或const int
):
The definition must have a type. Add int
(or const int
):
int lettersArr[26] = { letA, /*...*/ };
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