c++ - 包含函数作为成员的结构数组 C++

Question

我需要一个结构数组，用于根据所选点(只是一个数字)绘制屏幕元素。

我主要感兴趣的是正确的语法，即声明一个具有函数指针作为成员的结构，创建一个具有该结构类型元素的数组，并将参数传递给这些函数。类似于下面的代码，但语法正确。

struct menuStruct 
{
   void *leftEdgeSymbol(boolean show);
   void *certerScreenSymbol(boolean show);
   void *rightEdgeSymbol(boolean show);
   void *buttonFunction(void);
}; 


menuStruct allMenues[] = 
{
  {drawLeftArrow(), drawTempSettingText(), drawRightArrow(), mainMenu1()},  //0
  {eraseLeftArrow(), drawHumidTargetText(), drawRightArrow(), mainMenu2()},  //1
  {drawLeftMinusSign(), drawSetTempTarget(), drawRightPlusSign(), subMenu101()  //2
}




void drawLeftArrow(boolean show)
{
 //Draw the arrow with white colour to show or with black to erase 
}

void rightArrow(boolean show)
{
 //Draw the arrow with white colour to show or with black to erase 
}

Answer 1

语法是

struct menuStruct 
{
   void (*leftEdgeSymbol)(bool);
   void (*certerScreenSymbol)(bool);
   void (*rightEdgeSymbol)(bool);
   void (*buttonFunction)();
}; 

void drawLeftArrow(bool show)
{
     //Draw the arrow with white colour to show or with black to erase 
}

void rightArrow(bool show);

// ...

menuStruct allMenues[] = 
{
  {&drawLeftArrow, &drawTempSettingText, &drawRightArrow, &mainMenu1},  //0
  {&eraseLeftArrow, &drawHumidTargetText, &drawRightArrow, &mainMenu2},  //1
  {&drawLeftMinusSign, &drawSetTempTarget, &drawRightPlusSign, &subMenu101}  //2
}

和可能的用法:

allMenues[1].rightEdgeSymbol(false);