Question

我有三个C ++类，InventoryItem，SalesPerson和Transaction。我使用组合在Transaction中使用InventoryItem和SalesPerson类。我想使用用户输入而不是仅仅在构造函数中传递值，但我无法做到这一点。任何帮助将受到高度赞赏。以下是我的C ++文件。

    #include<iostream> 
    #include<string> 
    using namespace std; 

    class InventoryItem {
    private:
        int stockNum; double price;
    public:
        InventoryItem(int, double);
        void display(); };
    InventoryItem::InventoryItem(int stkNum, double pr) {
        stockNum = stkNum;
        price = pr; 
    }
    void InventoryItem::display() {
        cout << "Item #" << stockNum << " costs $" << price << endl;
    }

    //SalesPerson class
    class Salesperson {
    private:
        int idNum;
        string name; public:
        Salesperson(int, string); void display();
    };
    Salesperson::Salesperson(int id, string lastName) {
        idNum = id;
        name = lastName; 
    }
    void Salesperson::display() {
        cout << "Salesperson #" << idNum << " " << name << endl;
    }

    //Transaction(main class)
    class Transaction {
    private:
        int transNum; 
        InventoryItem itemSold; 
        Salesperson seller;
    public:
        Transaction(int, int, double, int, string); 
        void display();
    };
    Transaction::Transaction(int num, int item, double pr,
                             int salesId, string name) : itemSold(item, pr),
        seller(salesId, name) {
        transNum = num; 
    }
    void Transaction::display() {
        cout << "Data for transaction #" << transNum << endl; itemSold.display();
        seller.display();
    }
    int main() {
        Transaction aSale(247, 782, 44.77, 512, "Richardson"); aSale.display();
        return 0;
    }

Answer 1

我发布这个作为答案而不是评论，因为我的手机上没有反引号。所以你想做一些像

这样的事情

int main()
{
    int x, y, z;
    double f;
    string name;

    cin >> x >> y >> f >> z >> name;

    Transaction(x, y, f, z, name);
    return 0;
}

当然，您可以将cin行划分为每个变量cin和cout指示用户必须输入的内容。这看起来像这样

int main()
{
    int x, y, z;
    double f;
    string name;

    cout << "Enter x: ";
    cin >> x;
    cout << "Enter y: ";
    cin >> y;
    cout << "Enter f: ";
    cin >> f;
    cout << "Enter z: ";
    cin >> z;
    cout << "Enter name: ";
    cin >> name;

    Transaction(x, y, f, z, name);
    return 0;
}

将cout行中的字符串替换为您想要提示用户的字符串。

如何使用＆＃34; cin＆＃34;进行用户输入在C ++中使用组合

1 个答案: