c++关于重载运算的问题

问题遇到的现象和发生背景

关于重载<<和重载=的bug

#include<iostream>
#include<cstring>
#include<malloc.h>
using namespace std;
using  std::ostream;

class Costmap2D
{
    private:
        char name[10]; //地图名 
        unsigned int size_x_;//表示x方向最大距离（x方向像素点个数）
        unsigned int size_y_;//表示y方向最大距离（y方向像素点个数）
        double resolution_;//分辨率大小
        unsigned char* costmap_;  //地图数据
        unsigned char default_value_;
       
    public:
            initMaps();
            resetMaps();
        //构造函数 
        
        Costmap2D (unsigned int size_x_,unsigned int size_y_,double resolution_)
         :size_x_(size_x_),size_y_(size_y_),costmap_(NULL),resolution_(resolution_)
        {
            unsigned int size = size_x_* size_y_;
            costmap_= new unsigned char[size];
 
            // create the costmap
}            
          
            void resizeMap(unsigned int size_x, unsigned int size_y, double resolution)
            {
              size_x_ = size_x;
              size_y_ = size_y;
              resolution_ = resolution;
             
              initMaps(size_x, size_y);
              // reset our maps to have no information
              resetMaps();
            }
            void initMaps(unsigned int size_x, unsigned int size_y)
            {
            //  boost::unique_lock<mutex_t> lock(*access_);
              delete[] costmap_;
            //让指针指向分配的空间
              costmap_ = new unsigned char[size_x * size_y];
            }
        
        
        //析构函数 
        ~Costmap2D()
        {
        delete[] costmap_;
        }
Costmap2D operator=(const Costmap2D&);
        };

        Costmap2D& operator=(const Costmap2D& map)//对等号重载
            {
            size_x_ = map.size_x_;
            size_y_ = map.size_y_;
            resolution_ = map.resolution_;
            }
        

         ostream& operator<<(ostream& cout,Costmap2D&costmap )//对左移运算符<<重载
            {
                cout <<"宽="<<coostmap.size_x_<<'\n';
                cout <<"长="<<costmap.size_y_<<'\n';
                cout <<"分辨率="<<costmap.resolution<<'\n';
                cout <<"宽="<<costmap.defaultValue<<'\n';
                cout << "Data:\n";
        for (unsigned int i = 0; i < map.size_x_(); i++)
        {
            for (unsigned int j = 0; j < map.size_y_(); j++)
            {
                cout << std::uppercase << std::setw(2) << std::setfill('0')
                   <<(map(i, j)) << ' ';
            }
            cout << '\n';
        }
        return cout;
    
            }
            int main()
{
    Costmap2D map = {{1, 2, 3}, {4, 5, 6}, {200, 201, 202}, {255}};
    std::cout << map;
    return 0;
}

img

img

运行结果及报错内容

初学求改正

我的解答思路和尝试过的方法

你贴源码吧，这样没法改
这些函数都没定义，你光这么问解决不了问题啊，也不看见你去补充函数。_data的问题也不改

别贴照片，用插入代码块贴源码

25行改为：constmap_ = new unsigned char[size];
31行：多了个分号。
40行：多了个 } ，放到后面去，把重载的成员方法括进去。

全是些基础的错误，你还是回去好好看看书吧，这么多错误也没法一一改，更重要的是我根本看不懂是什么意思。能改的地方都给改了，注释掉的代码是我实在没看懂你想干啥。。

#include<iostream>
#include<iomanip>
using namespace std;

class Costmap2D
{
private:
    char name[10]; //地图名 
    unsigned int size_x_;//表示x方向最大距离（x方向像素点个数）
    unsigned int size_y_;//表示y方向最大距离（y方向像素点个数）
    double resolution_;//分辨率大小
    unsigned char* costmap_;  //地图数据
    unsigned char default_value_;

public:
    //构造函数 

    Costmap2D(unsigned int size_x_, unsigned int size_y_, double resolution_)
        :size_x_(size_x_), size_y_(size_y_), costmap_(NULL), resolution_(resolution_)
    {
        unsigned int size = size_x_ * size_y_;
        costmap_ = new unsigned char[size];

        // create the costmap
    }

    void resizeMap(unsigned int size_x, unsigned int size_y, double resolution)
    {
        size_x_ = size_x;
        size_y_ = size_y;
        resolution_ = resolution;

        initMaps(size_x, size_y);
        // reset our maps to have no information
        //resetMaps();
    }
    void initMaps(unsigned int size_x, unsigned int size_y)
    {
        delete[] costmap_;
        //让指针指向分配的空间
        costmap_ = new unsigned char[size_x * size_y];
    }
    friend ostream& operator<<(ostream& cout, Costmap2D& costmap);

    //析构函数 
    ~Costmap2D()
    {
        delete[] costmap_;
    }
    Costmap2D& operator=(const Costmap2D& map)//对等号重载
    {
        size_x_ = map.size_x_;
        size_y_ = map.size_y_;
        resolution_ = map.resolution_;
        return *this;
    }
};



ostream& operator<<(ostream& cout, Costmap2D& costmap)//对左移运算符<<重载
{
    cout << "宽=" << costmap.size_x_ << '\n';
    cout << "长=" << costmap.size_y_ << '\n';
    cout << "分辨率=" << costmap.resolution_ << '\n';
    cout << "宽=" << costmap.default_value_ << '\n';
    cout << "Data:\n";
    for (unsigned int i = 0; i < costmap.size_x_; i++)
    {
        for (unsigned int j = 0; j < costmap.size_y_; j++)
        {
            //cout << std::uppercase << std::setw(2) << std::setfill('0')
                //<< (costmap(i, j)) << ' ';
        }
        cout << '\n';
    }
    return cout;

}
int main()
{
    //Costmap2D map = { {1, 2, 3}, {4, 5, 6}, {200, 201, 202}, {255} };
    //std::cout << map;
    return 0;
}