C 用循环初始化结构

Question

下面是我正在编写的程序中结构的代码。我希望能够在某种循环中初始化这些参数，但我似乎无法弄清楚如何配置 .water/.air/.purge 属性以通过循环更新。 nozzle_count 是 16，所以我想找到一种方法来实现下面的代码，而不必只复制和粘贴它 16 次。我很感激任何意见。谢谢!

static nozzle nozzles[nozzle_count] = {
    {
        .water = C1_WATER, .air = C1_AIR, .purge = C1_PURGE,
        .interval = 15*60*1000, .cycle = 0*3*5*1000, .purge_length = 0*4*1000,
        .state = WAIT
    },
    {
        .water = C2_WATER, .air = C2_AIR, .purge = C2_PURGE,
        .interval = 2*60*1000, .cycle = 1*3*1000, .purge_length = 0*4*1000,
        .state = WAIT
    },
    {
        .water = C3_WATER, .air = C3_AIR, .purge = C3_PURGE,
        .interval = 2*60*1000, .cycle = 0*1*5*1000, .purge_length = 0*4*1000,
        .state = WAIT
    }
    {
        .water = C4_WATER, .air = C4_AIR, .purge = C4_PURGE,
        .interval = 2*60*1000, .cycle = 0*1*5*1000, .purge_length = 0*4*1000,
        .state = WAIT
    }
    {
        .water = C5_WATER, .air = C5_AIR, .purge = C5_PURGE,
        .interval = 2*60*1000, .cycle = 0*1*5*1000, .purge_length = 0*4*1000,
        .state = WAIT
    }
};

Answer 1

我认为您的代码看起来非常好，即使您的数组长度从 5 增加到 16。两个可能的建议。

如果你去掉 C99 初始化的绒毛，那么一切都可以放在一行中:

static nozzle nozzles[nozzle_count] = {
//    water     air     purge     interval    cycle       purge_length state
//    --------  ------  --------  ----------  ----------  ------------ ----
    { C1_WATER, C1_AIR, C1_PURGE, 15*60*1000, 0*3*5*1000, 0*4*1000,    WAIT },
//  ...
};

这是一个简单的表格，只有16行，清晰明了，易于维护。

其次，如果您需要保持每个成员的初始化，您可以将它包含在一个宏中，这有助于 DRY:

#define FOO(a, b, c, d, e, f, g)                                 \
    {                                                            \
       .water = (a), .air = (b), .purge = (c),                   \
       .interval = (d), .cycle = (e),  .purge_length = (f),      \
       .state = (b)                                              \
    }

static nozzle nozzles[nozzle_count] = {
//    water     air     purge     interval    cycle       purge_length state
//    --------  ------  --------  ----------  ----------  ------------ ----
 FOO( C1_WATER, C1_AIR, C1_PURGE, 15*60*1000, 0*3*5*1000, 0*4*1000,    WAIT ),
//  ...
};