c - 我可以使用列表重置数组值吗？

Question

我正在为 Arduino 编程。我想使用一个数组，但我想更改数组的内容，而代码正在使用我用来初始化数组的相同代码运行：

我可以做这个：

boolean framebuffer[6][5] = {
    {0,0,1,0,0},
    {0,0,0,1,0},
    {0,0,1,0,0},
    {0,1,0,0,0},
    {1,0,0,0,0},
    {1,1,1,1,1}
  };

但我不能这样做：

  framebuffer = {
    {0,0,1,0,0},
    {0,0,0,1,0},
    {0,0,1,0,0},
    {0,1,0,0,0},
    {1,0,0,0,0},
    {1,1,1,1,1}
  };

有没有可能像这样设置数组内容？我不想单独分配每个数组元素，如下所示：

  framebuffer[0][0] = 0;

Answer 1

您不能直接这样做，但是您可以预定义所有数组，然后将memcpy它们framebuffer：

// Put all your preconstructed items in some array.....
// You'd typically make this a global.

boolean glyphs[2][6][5] = {
    {
        {0,0,1,0,0},
        {0,0,0,1,0},
        {0,0,1,0,0},
        {0,1,0,0,0},
        {1,0,0,0,0},
        {1,1,1,1,1}
    },
    {
        {1,1,1,1,1},
        {1,0,0,1,1},
        {1,0,1,0,1},
        {1,1,0,0,1},
        {1,0,0,0,1},
        {1,1,1,1,1}
    }
};

// Then whereever you want to change the framebuffer in your code:
// copy the second into a framebuffer:
memcpy(framebuffer, glyphs[1], sizeof(boolean)*6*5);