第十周上机项目4我的向量类

来源：互联网发布：java中的变量有哪些编辑：程序博客网时间：2024/05/17 23:09
/* *Copyright (c) 2015, 烟台大学计算机学院 *All rights reserved. *文件名称：text.cpp *作者：陈栋梁 *完成日期：2015年 5月 13日 *版本号：v1.0 * */#include <iostream>using namespace std;class MyVector{public:    MyVector(int m);    MyVector(const MyVector &d);    ~MyVector();    friend istream &operator>>(istream &input, MyVector &d);    friend ostream &operator<<(ostream &output, const MyVector &d);    friend MyVector operator+(const MyVector &d1,const MyVector &d2);    friend MyVector operator-(const MyVector &d1,const MyVector &d2);    bool operator==(const MyVector &d);private:    int *Array;    int num;};MyVector::MyVector(int m){    num = m;    Array = new int[num];    for(int i=0; i<num; ++i)        Array[i]=0;}MyVector::MyVector(const MyVector &d){    num=d.num;    if(Array!=NULL) delete[]Array;    Array = new int[num];    for(int i=0; i<num; ++i)        Array[i]=d.Array[i];}MyVector::~MyVector(){    delete [] Array;}istream &operator>>(istream &input, MyVector &d){    cout<<d.num<<"个元素的向量: ";    for(int i=0; i<d.num; ++i)        cin>>d.Array[i];    return input;}ostream &operator<<(ostream &output, const MyVector &d){    cout<<"(";    if(d.num>0)        cout<<d.Array[0];    for(int i=1; i<d.num; ++i)        cout<<", "<<d.Array[i];    cout<<")";    return output;}MyVector operator+(const MyVector &d1,const MyVector &d2){    MyVector d(d1.num);    for(int i=0; i<d1.num; ++i)    {        d.Array[i]=d1.Array[i]+d2.Array[i];    }    return d;}MyVector operator-(const MyVector &d1,const MyVector &d2){    MyVector d(d1.num);    for(int i=0; i<d1.num; ++i)    {        d.Array[i]=d1.Array[i]-d2.Array[i];    }    return d;}bool MyVector::operator ==(const MyVector &d){    if(num!=d.num) return false;    bool eq = true;    for(int i=0; i<num; ++i)    {        if (Array[i]!=d.Array[i])        {            eq=false;            break;        }        if (!eq) break;    }    return eq;}int main(){    MyVector d1(5),d2(5);    cout<<"输入d1——";    cin>>d1;    cout<<"输入d2——";    cin>>d2;    cout<<"d1="<<d1<<endl;    cout<<"d2="<<d2<<endl;    cout<<"d1+d2="<<d1+d2<<endl;    cout<<"d1-d2="<<d1-d2<<endl;    cout<<"d1"<<((d1==d2)?"==":"!=")<<"d2"<<endl;    return 0;}
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