第六周实验报告2

#include<iostream>using namespace std;class A{private:    int a;public:    A(){a = 0;}    A(int aa):a(aa){}  void show();     };void main(){    A *p;                  p = new A(22);           p->show();    system("pause");}void A::show(){cout<<a<<endl;}

#include <iostream>using namespace std;class A {private:int *a; int n; int MaxLen;public:A(int *aa, int nn, int MM);A(): a(0), n(0), MaxLen(0) {}~A();//析构函数int GetValue(int i) {return a[i];} };A::A(int *aa, int nn, int MM){n=nn;MaxLen=MM;if(n>MaxLen) exit(1);a=new int[MaxLen];for(int i=0;i<MaxLen;++i)//以i为循环变量把aa数组中每个元素值传送给a数组的对应元素中{a[i] = aa[i];}}A::~A(){delete []a;} //析构函数的类外定义，释放指针型数据a所指向的空间void main(){int b[10]={1,2,3,4,5,6,7,8,9,10};A r(b,10,10);int i,s=0;for(i=0;i<10;++i)//以i为循环变量，把r对象的a数据成员中的每个元素值依次累加到s中{s += r.GetValue(i);}    cout<<"s="<<s<<endl;}