二维数组类Douary

只想说，其实还是一维动态数组。。。。

#include<iostream>#include<cmath>#include<cstring>using namespace std;class Douary{public:Douary(int m, int n);//构造函数：用于建立动态数组存放m行n列的二维数组（矩阵）元素，并将该数组元素初始化为0Douary(const Douary &d);  //因为有指针数据成员，复制构造函数需要定义~Douary(); //析构函数：用于释放动态数组所占用的存储空间。friend istream &operator>>(istream &input, Douary &d);//重载运算符“>>”输入二维数组friend ostream &operator<<(ostream &output, Douary &d);//重载运算符“<<”以m行n列形式输出friend Douary operator+(const Douary &d1,const Douary &d2);//两个矩阵相加，规则：对应位置上的元素相加friend Douary operator-(const Douary &d1,const Douary &d2);//两个矩阵相减，规则：对应位置上的元素相减bool operator==(const Douary &d);//判断两个矩阵是否相等，即对应位置上的所有元素是否相等private:int *Array;      //Array 为动态数组指针，构造函数中分配空间用Array = new int[row*col];int row;          //row  为二维数组的行数。int col;          //col   为二维数组的列数。};Douary::Douary(int m, int n):row(m),col(n){Array=new int[row*col];}Douary::Douary(const Douary &d){  row=d.row;  col=d.col;  Array=new int[row*col];  for(int i=0;i<d.row;i++)    for(int j=0;j<d.col;j++)      Array[i*row+j]=d.Array[i*row+j];}Douary::~Douary(){delete[]Array;}istream &operator>>(istream &input, Douary &d){  for(int i=0;i<d.row;i++)    for(int j=0;j<d.col;j++)      input>>d.Array[i*d.row+j];  return input;}ostream &operator<<(ostream &output, Douary &d){  for(int i=0;i<d.row;i++)    for(int j=0;j<d.col;j++)      {        output<<d.Array[i*d.row+j]<<" ";        if(j==d.col-1)output<<endl;      }  return output;}Douary operator+(const Douary &d1,const Douary &d2){  Douary aa(d1);  if(d1.row!=d2.row||d1.col!=d2.col)cout<<"尼玛这能加吗？"<<endl;  else    for(int i=0;i<d1.row;i++)      for(int j=0;j<d1.col;j++)        aa.Array[i*d1.row+j]=d1.Array[i*d1.row+j]+d2.Array[i*d2.row+j];  return aa;}Douary operator-(const Douary &d1,const Douary &d2){  Douary aa(d1);  if(d1.row!=d2.row||d1.col!=d2.col)cout<<"尼玛这能加吗？"<<endl;  else    for(int i=0;i<d1.row;i++)      for(int j=0;j<d1.col;j++)        aa.Array[i*d1.row+j]=d1.Array[i*d1.row+j]-d2.Array[i*d2.row+j];  return aa;}bool Douary::operator==(const Douary &d){  for(int i=0;i<d.row;i++)    for(int j=0;j<d.col;j++)     {       if(Array[i*d.row+j]!=d.Array[i*d.row+j])       return false;     }  return true;}int main(){    Douary d1(2,2),d2(2,2);    cout<<"输入d1:"<<endl;    cin>>d1;    cout<<"输入d2:"<<endl;    cin>>d2;    cout<<"d1="<<endl;    cout<<d1;    cout<<"d2="<<endl;    cout<<d2;    cout<<"d1+d2="<<endl;    Douary d3=d1+d2;    cout<<d3;    cout<<"d1-d2="<<endl;    Douary d4=d1-d2;    cout<<d4;    cout<<"d1"<<((d1==d2)?"==":"!=")<<"d2"<<endl;    return 0;}