神奇的array2

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

class Array2 {
    int **p;
public:

    Array2(){};
    Array2(int x,int y){
        p=new int*[x];
        for(int i=0;i<x;i++)
            p[i]=new int[y];
    }
    int *operator[](int index){return p[index];};
    int operator ()(int i,int j){ return p[i][j];};

};

int main() {
    Array2 a(3,4);
    int i,j;
    for(  i = 0;i < 3; ++i )
        for(  j = 0; j < 4; j ++ )
            a[i][j] = i * 4 + j;
    for(  i = 0;i < 3; ++i ) {
        for(  j = 0; j < 4; j ++ ) {
            cout << a(i,j) << ",";
        }
        cout << endl;
    }
    cout << "next" << endl;
    Array2 b;     b = a;
    for(  i = 0;i < 3; ++i ) {
        for(  j = 0; j < 4; j ++ ) {
            cout << b[i][j] << ",";
        }
        cout << endl;
    }
    return 0;
}

好吧，还是要老老实实建一个二维数组（之前写法太蛇皮了2333）

public:
    int * p=NULL;
    int *pp;
    int r,c;
    int mark=0;
    Array2 (int i,int j){
        int* tmp;
        tmp=new int[i*j];
        p=tmp;
        r=i;
        c=j;
    }
    Array2(){
        p=NULL;
    }


    Array2& operator[](int i){
        if(mark==0){
            pp=p+i*c;
            mark=1;}
        else{
            pp+=i;
            mark=0;
        }
        return *this;
    }
    friend ostream& operator<<(ostream& os,Array2 s){
        os<<*(s.pp);
        return os;
    }
    void operator=(int n){
        *(pp)=n;
    }
    void operator=(Array2& s){
        p=s.p;
        r=s.r;
        c=s.c;
    }
int& operator()(int i,int j){
        return *(p+i*c+j);
    }