怎么在.c文件中使用另一个文件中已经初始化好的字符数组

Question

这边在一个.c文件中定义和初始化一个二字符数组，想要在其他.c文件中也使用，该怎么完成这个？

char g_idle_icon_name[DSS_INVALID][64] = {
    [DSS_EDIT] = {"side_dss_edit"}, /*none*/
    [DSS_BLF_LIST] = {"side_dss_blflist"},
    [DSS_DTMF] = {"side_dss_dtmf"},
    [DSS_KEY_EVENT] = {"side_dss_keyevent"}, /*none*/
    [DSS_LINE] = {"side_dss_line"},
    [DSS_MCAST] = {"side_dss_mcast"},
    [DSS_MEM_AXFER] = {"side_dss_mem_axfer"},
    [DSS_MEM_BXFER] = {"side_dss_mem_bxfer"},
    [DSS_MEM_CALLPARK] = {"side_dss_mem_callpark"},
    [DSS_MEM_CFW] = {"side_dss_mem_cfw"},
    [DSS_MEM_CONF] = {"side_dss_mem_conf"},
    [DSS_MEM_DTMF] = {"side_dss_mem_dtmf"},
    [DSS_MEM_INTERCOME] = {"side_dss_mem_intercome"},
    [DSS_MEM_MWI] = {"side_dss_mem_mwi"},
    [DSS_MEM_NEWCALL] = {"side_dss_mem_newcall"},
    [DSS_MEM_NONE] = {"side_dss_mem_none"},
    [DSS_MEM_PRESENT] = {"side_dss_mem_present"},
    [DSS_MEM_SPDIAL] = {"side_dss_mem_spdial"},
    [DSS_URL] = {"side_dss_url"},
};

Answer 1

要在该数组的定义前添加extern关键字，这会告诉编译器这个变量是在其他文件中定义的。

例如，在其他.c文件中，你可以这样声明变量：

extern char g_idle_icon_name[DSS_INVALID][64];

这将使编译器知道g_idle_icon_name数组是在其他文件中定义的，并且可以在当前文件中使用。