Question

我已经在这工作了好几个小时，我无法弄清楚哪个班级给我带来了问题。我得到了一堆＆＃39; VendSlot＆＃39;没有命名类型＆＃34;错误。我感谢您提供的任何帮助。我是C ++的新手，非常沮丧。

//class Snack
#ifndef SNACK_HPP
#define SNACK_HPP
#include <iostream>
#include <string>
using namespace std;

class Snack
{
private:
    string name;
    double price;
    int calories;

public:
    Snack();
    Snack(string name, double price, int calories);
    string getName();
    double getPrice();
    int getNumCalories();
};


#endif

Snack.cpp

#include "Snack.hpp"
#include <iostream>
#include <string>
using namespace std;

Snack::Snack()
{
    name = "bottled water";
    price = 1.75;
    calories = 0;
}

Snack::Snack(string n, double p, int c)
{
    name = n;
    price = p;
    calories = c;
}

string Snack::getName()
{
    return name;
}

double Snack::getPrice()
{
    return price;
}

int Snack::getNumCalories()
{
    return calories;
}

VendSlot.hpp

#ifndef VENDSLOT_HPP
#define VENDSLOT_HPP
#include "Snack.hpp"

class VendSlot
{
private:
    Snack s;
    int amount;

public:
    VendSlot();
    VendSlot(Snack s, int a);
    Snack getSnack();
    int getAmount();
    int decrementAmount();
};
#endif

VendSlot.cpp

#include "VendSlot.hpp"
#include <iostream>
#include <string>
using namespace std;

VendSlot();

VendSlot::VendSlot()
{
    Snack s1;
    s = s1;
    amount = 5;
}

VendSlot::VendSlot(Snack s1, int a)
{
    s = s1;
    amount = 5;
}

Snack VendSlot::getSnack()
{
    Snack s1;
    s = s1;
    return s;
}

int VendSlot::getAmount()
{
    return amount;
}

int VendSlot::decrementAmount()
{
    amount--;
    return amount;
}

MiniVend.hpp

#ifndef MINIVEND_HPP
#define MINIVEND_HPP
#include "VendSlot.hpp"

class MiniVend
{
private:
    VendSlot vs1;
    VendSlot vs2;
    VendSlot vs3;
    VendSlot vs4;
    double money;

public:
    MiniVend();
    MiniVend(VendSlot v1, VendSlot v2, VendSlot v3, VendSlot v4, double money);
    int numEmptySlots();
    double getMoney();
    double valueOfSnacks();
    void buySnack();
};
#endif

MiniVend.cpp

#include "VendSlot.hpp"

using namespace std;

MiniVend::MiniVend(VendSlot v1, VendSlot v2, VendSlot v3, VendSlot v4, double m)
{
    vs1 = v1;
    vs2 = v2;
    vs3 = v3;
    vs4 = v4;
    money = m;
}

double MiniVend::getMoney()
{
    return money;
}

int MiniVend::numEmptySlots()
{
    int numSlots = 0;
    if (vs0.getAmount() == 0)
        slots++;
    if (vs1.getAmount() == 0)
        slots++;
    if (vs2.getAmount() == 0)
        slots++;
    if (vs3.getAmount() == 0)
        numSlots++;

    return numSlots;
}

double MiniVend::valueOfSnacks()
{
    double value = 0;
    value = (vs0.getSnack().getPrice() * vs0.getAmount() +
    (vs1.getSnack().getPrice() * vs1.getAmount()) +
    (vs2.getSnack().getPrice() * vs2.getAmount()) +
    (vs3.getSnack().getPrice() * vs3.getAmount()))

    return value;
}

void MiniVend::buySnack(int slot);
{
    if (slot == 0 && vs0.getAmount >= 1)
    {
        money = money + vs0.getSnack.getPrice();
        vs0.decrementAmount();
    }

    else if (slot == 1 && vs1.getAmount >= 1)
    {
        money = money + vs1.getSnack.getPrice();
        vs1.decrementAmount();
    }

    else if (slot == 2 && vs2.getAmount >= 1)
    {
        money = money + vs2.getSnack.getPrice();
        vs2.decrementAmount();
    }

    else if (slot == 3 && vs3.getAmount >= 1)
    {
        money = money + vs3.getSnack.getPrice();
        vs3.decrementAmount();#include "Snack.hpp"
    }

    else
        cout << "Sold out.  Please select another Snack." << endl;
}

主要

#include "MiniVend.hpp"
#include "Snack.hpp"
#include "VendSlot.hpp"
#include <iostream>
#include <string>
using namespace std;

 int main()
{
 Snack s2("candy bar", 1.25, 300);
 Snack s3("root beer", 2.00, 450);

 VendSlot groucho(s1, 2);
 VendSlot harpo(s2, 1);
 VendSlot chico(s3, 0);
 VendSlot zeppo;  // five bottles of water

 MiniVend machine(groucho, harpo, chico, zeppo, 0);

 cout << machine.numEmptySlots() << endl;
 cout << machine.valueOfSnacks() << endl;
 cout << machine.getMoney() << endl;
 machine.buySnack(1);
 cout << machine.numEmptySlots() << endl;
 cout << machine.valueOfSnacks() << endl;
 cout << machine.getMoney() << endl;

 return 0;
}

Answer 1

在MiniVend.hpp，您的buySnack不接受任何参数void buySnack();，但在Minivend.cpp，您在函数头中定义了一个参数 void MiniVend::buySnack(int slot);，你也不应该使用分号。
您的MiniVend.cpp文件也应包含"MiniVend.hpp"标题。
在MiniVend.cpp中，函数声明int MiniVend::numEmptySlots() vs0未在代码中的任何位置定义，slots
在您的主要功能中，您尝试声明此VendSlot groucho(s1, 2);，但尚未在主要功能中的任何位置定义s1

这就是我到目前为止所发现的。希望这有帮助，请在发布问题时使用评论，以便每个人都能理解代码的目的。

班级名称没有命名类型 - 拉我的头发

1 个答案: