c++ - cpp 太多初始化器 - 数组中的结构

Question

我刚接触 cpp 几天，一直在为以下定义而苦苦挣扎:

struct menuItem {
    char* name;
    int value;
};

struct topMenu {
    int menuIcon;
    char* Name;
    menuItem item[];
};

topMenu menuRoot[] = {
    { 0, "File", 
        {"Open ...", 1},
        {"New ...", 4},
        {"Close", 1},
        {"Exit", 3}

    },
    { 0, "Edit", 
        {"Cut ", 3},
        {"Copy", 8},
        {"Paste", 2},
        {"Find", 1},
        {"Replace", 6}

    },
    { 0, "Help", 
        {"Help", 7},
        {"About", 9},
        {"Update ..", 9}
    }  
};

我收到错误

33:1: error: too many initializers for 'menuItem [0]'
33:1: error: too many initializers for 'topMenu'
33:1: error: too many initializers for 'menuItem [0]'
33:1: error: too many initializers for 'topMenu'
33:1: error: too many initializers for 'menuItem [0]'
33:1: error: too many initializers for 'topMenu'

抱歉，我有点卡住了……也许来晚了:)提前致谢。

Answer 1

首先，将 menuItem item[] 数组包裹在 {} 中，因为目前它认为有很多数组，而不是只有一个。

接下来，如前所述，将 char * 更改为 const char *。

现在对于灵活数量的 menuItem 结构，使用 vector 而不是数组。

#include <vector> 

struct menuItem {
    const char *name;
    int value;
};

struct topMenu {
    int menuIcon;
    const char *Name;
    std::vector<menuItem> item;
};

topMenu menuRoot[] = {
    { 0, "File", {
        {"Open ...", 1},
        {"Open ...", 1},
        {"Open ...", 1},
        {"Open ...", 1},
    }
    },
    { 0, "Help", {
        {"Open ...", 1},
        {"Open ...", 1},
        {"Open ...", 1}, }
    }
};