给定宽度和高度，如何调整对象的 2D 矢量大小? [英] How can I resize a 2D vector of objects given the width and height?

问题描述

我的类 GameBoard 有一个成员变量，它是 Tile 类的对象的二维向量.GameBoard 构造函数将宽度和高度作为参数.

My class, GameBoard, has a member variable that is a 2D vector of an object of the class Tile. The GameBoard constructor takes width and height as parameters.

如何根据传递给构造函数的宽度和高度调整 Tile 对象的二维向量?我怎样才能用 Tile 对象填充它，以便我可以做这样的事情?

How can I get the 2D vector of Tile objects to resize according to the width and height passed to the constructor? How can I fill it with Tile objects so that I can do something like this?

myVector[i][j].getDisplayChar();

代码片段

m_vvTiles.resize(iHeight);

for(auto it = m_vvTiles.begin(); it != m_vvTiles.end(); it++ ){

    (*it).resize(iWidth,Tile(' '));
}

推荐答案

您必须分别调整外向量和内向量的大小.

You have to resize the outer and inner vectors separately.

myVector.resize(n);
for (int i = 0; i < n; ++i)
    myVector[i].resize(m);

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