C++编译问题

Question

当我尝试编译时,我遇到了一个错误问题.错误说,error: no matching function for call to 'Invoice::Invoice(const char [10], double, int)' 它给了我错误

//create an invoice using constructor with parameters
    Invoice ductTape("Duct Tape",2.99,10);

这是我的代码,首先你需要将它保存为Invoice.h我花了一些时间来实际修复大部分错误.只是,这是我唯一的错误.

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

class Invoice
    {

    public:

        void setDescription(string bagofhammers)
        {
    description = "bag of hammers";
        }

        void setQuantity(int)
        {
            quantity = 1;
        }
        void setPrice (int)
        {
            price = 12.99;
        }

        void ductTape()
        {
            setDescription("Duct Tape");
            setPrice(2.99);
            setQuantity(10);
        }
        string getDescription(string description)
        {
            return description;
        }

        int getQuantity(int quantity)
        {
            return quantity;
        }

        int getPrice(double price)
        {
            return price;
        }

        void print() 
        { 
            std::cout << "Invoiced item is: " << getDescription(description) << endl;

            std::cout << "Quantity ordered: "<< getQuantity(quantity) << endl;

            std::cout << "Each unit's price is: "<< getPrice(price) << endl;

            std::cout << "Total Amount: "<< (getPrice(price)*getQuantity(quantity)) << endl;
        }


    private:
        string description;
        double price;
        int quantity;
    };

而这一个是将使用它的程序.

#include <iostream>
#include "Invoice.h"
using namespace std;

int main() {

    string description;
    double price;
    int quantity;

    cout << "Enter the description: ";
    getline(cin, description);

    cout << "Enter the unit price: ";
    cin >> price;

    cout << "Enter the quantity: ";
    cin >> quantity;
    cout << endl;//a new line

    //create an invoice using default constructor
    Invoice hammers;
    hammers.setDescription(description);
    hammers.setPrice(price);
    hammers.setQuantity(quantity);

    //now print the invoice
    hammers.print();
    cout << endl;

    //create an invoice using constructor with parameters
    Invoice ductTape("Duct Tape",2.99,10);

    cout << "[Invoice for object created using constructor]" <<endl;
    ductTape.print();
    cin.ignore(255,'\n');//ignore any leftover new lines
    cin.get();//pause the output...
    return 0;
}

我会假设我在ductTape部分拧了一些东西.你必须记住,这是我第一次使用C++.所以,如果你不介意解释这有什么问题,希望我可以从中学习.

Answer 1

你缺少构造函数.添加到标题中的公共部分

Invoice() :
description(0), price(0), quantity(0) {}

Invoice(const char* _description, double _price, int _quantity) :
description(_description), price(_price), quantity(_quantity) {}