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 = 0; 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(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;
}