POJ C++程序设计 编程题＃1 编程作业—文件操作与模板

编程题＃1

来源: POJ (Coursera声明：在POJ上完成的习题将不会计入Coursera的最后成绩。)

注意： 总时间限制: 1000ms 内存限制: 65536kB

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。

#include <iostream>
using namespace std;
// 在此处补充你的代码
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;
}

输入

无

输出

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,

样例输入

无

样例输出

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,

提示

提示：类里面可以定义类，类模版里面也可以定义类模版。例如：

class A
{
    class B {

    };
};

template
class S
{
    T x;
    class K {
        T a;
    };
};

---

 #include <iostream>
 using namespace std;
 // 在此处补充你的代码
 template <class T>
 class CArray3D {
 public:
     template <class T1>
     class CArray2D {
     private:
         T1 *a;
         int i,j;
     public:
         CArray2D() {a = NULL;}
         CArray2D(int a1, int a2):i(a1),j(a2) {
             a = new T1[i*j];
         }
         ~CArray2D() {
             if (a != NULL) delete []a;
         }
         T1 *operator[](int a1) {
             return a + a1*j;
         }
     };
     CArray3D() {array2D = NULL;}
     CArray3D(int a1, int a2, int a3) {
         array2D = new CArray2D<T>*[a1];
         for (int m = ; m < a1; ++m) {
             array2D[m] = new CArray2D<T>(a2, a3);
         }
     }
     CArray2D<T> &operator[](int i) {
         return *array2D[i];
     }
     ~CArray3D() {
         if (array2D != NULL) delete []array2D;
     }
 private:
     CArray2D<T> **array2D;
 };
 int main()
 {
     CArray3D<int> a(,,);
     int No = ;
     for( int i = ; i < ; ++ i )
         for( int j = ; j < ; ++j )
             for( int k = ; k < ; ++k )
                 a[i][j][k] = No ++;
     for( int i = ; i < ; ++ i )
         for( int j = ; j < ; ++j )
             for( int k = ; k < ; ++k )
                 cout << a[i][j][k] << ",";
     return ;
 }