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我需要重载多个不同对象的加法运算符并返回一个'集群对象：“重载加法运算符（+）以添加台式机、笔记本电脑和集群的任何实例组合。此运算符应返回集群类型的对象”所以如果我有桌面1+笔记本电脑1+笔记本电脑2；我需要它返回一个添加所有 RAM 和每个对象的其他变量的集群。但它只会添加所有对象从计算机类继承的变量。这是我的项目其余部分的代码。谢谢！

#include <iostream>

using namespace std;

class computer
{
    public:
        double RAM;
        double CPUSpeed;
        int numberOfCores;
        double HDDSize;
        virtual void print();
};
class desktop : public computer
{
    public:
        bool hasMonitor;
        double monitorSize;
        friend istream& operator>> (istream &in, desktop &myDesktop);
};
class laptop : public computer
{
    public:
        double screenSize;
};
class cluster : public computer
{
    public:
        int numOfComp;
};
desktop::desktop()
{
    RAM = 0;
    CPUSpeed = 0;
    numberOfCores = 0;
    HDDSize = 0;
    hasMonitor = 0;
    monitorSize = 0;
}
laptop::laptop()
{
    RAM = 0;
    CPUSpeed = 0;
    numberOfCores = 0;
    HDDSize = 0;
    screenSize = 0;
}
cluster::cluster()
{
    RAM = 0;
    CPUSpeed = 0;
    numberOfCores = 0;
    HDDSize = 0;
    numOfComp = 0;
}
istream& operator>> (istream &in, desktop &myDesktop)
{
    in >> myDesktop.hasMonitor;
    in >> myDesktop.monitorSize;
    in >> myDesktop.RAM;
    in >> myDesktop.CPUSpeed;
    in >> myDesktop.HDDSize;
    in >> myDesktop.numberOfCores;
    return in;
}
istream& operator>> (istream &in, laptop &mylaptop)
{
    in >> mylaptop.RAM;
    in >> mylaptop.CPUSpeed;
    in >> mylaptop.HDDSize;
    in >> mylaptop.numberOfCores;
    in >> mylaptop.screenSize;
    return in;
}
istream& operator>> (istream &in, cluster &myCluster)
{
    in >> myCluster.RAM;
    in >> myCluster.CPUSpeed;
    in >> myCluster.HDDSize;
    in >> myCluster.numberOfCores;
    in >> myCluster.numOfComp;
    return in;
}
operator+(computer &myComp)
{
    return
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1 回答 1

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如果您只想将它​​们从计算机继承的所有类的公共值相加，您可以这样做：

cluster operator+(const computer& comp1, const computer& comp2)
{
    cluster ret;
    ret.RAM = comp1.RAM+comp2.RAM;
    ret.CPUSpeed = comp1.CPUSpeed+comp2.CPUSpeed;
    ret.numberOfCores = comp1.numberOfCores+comp2.numberOfCores;
    ret.HDDSize = comp1.HDDSize+comp2.HDDSize;
    return ret;
}

int main()
{
    laptop laptop1;
    desktop desktop1;
    desktop desktop2;
    cluster mycluster = laptop1+desktop1+desktop2;
    return 0;
}

链式 + 运算符从右向左计算。该函数返回一个簇对象，然后可以将其用作下一次加法的右手操作数。

于 2013-10-06T22:26:57.347 回答