C++:数组，初始值设定项无法确定的大小

Question

我尝试按照书中的示例编写消息映射。

这是我的代码:

typedef struct MsgMapEntry_t {  
    UINT nMessage;  
    LONG (*pFunc)(HWND, UINT, WPARAM, LPARAM);  
} MsgMapEntry_t;  

// Skip Lines  

LRESULT CALLBACK CyauShellWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)  
{
    static MsgMapEntry_t OnMsgMap[]=  
    (  
        // TODO Register MsgFunc here  
        WM_DESTROY, ExitApplication  
    );  

编译，编译器报错:

D:\Projects\cyau\cyau_pre3_20120225\cyau_main.cpp:116:15: warning: left operand of comma operator has no effect [-Wunused-value]
D:\Projects\cyau\cyau_pre3_20120225\cyau_main.cpp:117:2: error: initializer fails to determine size of 'OnMsgMap'

所以，请问如何更正。

Answer 1

数组初始化器使用花括号 { ... } 而不是圆括号 ( ... )。