'->' 的基本操作数具有非指针类型向量<object*>

Question

std::vector<Piece*> player1, player2;

/* Filling player 1 and 2 vith piece 
   player1.push_back(new Piece()) */

std::vector<Piece*> *currentPlayer, *opponent;

currentPlayer = &player1;
opponent      = &player2

for(int i = 0; i < currentPlayer.size(); ++i)
{
    // This is where i get the error
    // error: base operand of '->' has non-pointer type 'std::vector<Piece*>'
    currentPlayer[i]->memberFunctionOfPiece()
}

如您所见，我正在尝试使用指向指针向量的指针。但是在尝试访问向量时得到非指针类型为什么我不能访问成员函数？

Answer 1

问题是您试图在指针类型上使用方括号：

currentPlayer[i]->memberFunctionOfPiece();

您可以使用 operator[] 或者更好地使用 at 函数

currentPlayer->at(i)->memberFunctionOfPiece();

或

currentPlayer->operator[](i)->memberFunctionOfPiece();

Answer 2

您还可以在 STL 容器上使用范围循环

for(auto&& player : *currentPlayer)
{
    player->memberFunctionOfPiece();
}

'->' 的基本操作数具有非指针类型向量<object*>

Base operand of '->' has non-pointer type vector<object*>

c++

pointers

stdvector