太多的初始化值 C++

Question

有人可以解释为什么我收到以下编译器错误：

错误：'std::array<std::array<State, 2>, 8> 的初始值设定项过多

#include <iostream>
#include <array>

using namespace std;

enum State
{
  NONE,
  WHITE,
  BLACK
};


int main()
{

  array<array<State, 2>, 8> initial = {
    { State::NONE, State::NONE },
    { State::WHITE, State::WHITE },
    { State::NONE, State::NONE },
    { State::NONE, State::NONE },
    { State::NONE, State::NONE },
    { State::NONE, State::NONE },
    { State::BLACK, State::BLACK },
    { State::NONE, State::NONE }
  };

  return 0;
}

Answer 1

您可以像这样使用普通数组：

State ini[8][2] = {
   { State::NONE, State::NONE },
  { State::WHITE, State::WHITE },
  { State::NONE, State::NONE },
  { State::NONE, State::NONE },
  { State::NONE, State::NONE },
  { State::NONE, State::NONE },
  { State::BLACK, State::BLACK },
  { State::NONE, State::NONE }
};

或修复您的代码添加一对括号：

 array<array<State, 2>, 8> initial = { {
      {State::NONE, State::NONE },
      { State::WHITE, State::WHITE },
      { State::NONE, State::NONE },
      { State::NONE, State::NONE },
      { State::NONE, State::NONE },
      { State::NONE, State::NONE },
      { State::BLACK, State::BLACK },
      { State::NONE, State::NONE }
    } };