北京大学C++程序设计coursera课程第七周编程填空题

描述

实现一个三维数组模版CArray3D，可以用来生成元素为任意类型变量的三维数组，使得下面程序输出结果是：

0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,

注意，只能写一个类模版，不能写多个。

无复合类定义实现：

#include <iostream>
using namespace std;
template <class T>
class CArray3D
{
    private:
        T *** array;
        int r,c,l;
    public:
        CArray3D(int _r, int _c, int _l)
        {
            array = new T **[_r];
            for(int i = 0;i<_r; i++)  
            {  
                array[i] = new T*[_c];  
            }  
            for(int i = 0;i<_r; i++)  
            {  
                for(int j=0; j<_c; j++)
                {
                    array[i][j] = new T[_l];    
                }  
            }
            r = _r; c = _c; l = _l;
        }
    
        ~CArray3D()
        {
            for(int i = 0;i<r; i++)  
            {  
                for(int j=0; j<c; j++)
                {
                    delete []array[i][j];    
                }  
                delete []array[i];
            }
            delete []array;
        }
    int ** operator[] (int index) 
    {  
        return array[index];  
    } 
    
};


int main()
{
    CArray3D<int> a(3,4,5);
    int No = 0;
    for( int i = 0; i < 3; ++ i )
        for( int j = 0; j < 4; ++j )
            for( int k = 0; k < 5; ++k )
                a[i][j][k] = No ++;
    for( int i = 0; i < 3; ++ i )
        for( int j = 0; j < 4; ++j )
            for( int k = 0; k < 5; ++k )
                cout << a[i][j][k] << ",";
    return 0;
}