奇怪的代码编译 [英] Code Compiling Strangely

问题描述

这是我的.h文件

我认为我可以修复我的代码，所以它会编译， p>

  #pragma once 
 #include< string> 
 using namespace std; 
 
 class Item 
 {
 private：
 string description; 
 double price; 
 int weight; 
 int quantity; 
 
 public：
 Item（void）; 
〜Item（void）; 
 Item :: Item（double OrderPrice，int OrderWeight，string Description）; 
 void setOrderPrice（double amount）; 
 void setOrderWeight（int ounces）; 
 void setDescription（string desc）; 
 void setQuantity（int number）; 
 
 int getOrderPrice（）; 
 int getOrderWeight（）; 
 string getDescription（）; 
 int getQuantity（）; 
 
 void show（）; 
}; 
  

这是我的.cpp文件：

  #include< iostream> 
 #include< string> 
 #includeItem.h
 using namespace std; 
 
 Item :: Item（void）
 {
} 
 
 Item :: Item（double OrderPrice，int OrderWeight，string Description）
 {
} 
 
 Item ::〜Item（void）
 {
} 
 
 void Item :: setOrderPrice（double amount） {
 price = amount; 
} 
 
 void Item :: setOrderWeight（int ounces）{
 weight = ounces; 
} 
 
 void Item :: setDescription（string desc）{
 description = desc; 
} 
 
 void Item :: setQuantity（int number）{
 quantity = number; 
} 
 
 int Item :: getOrderPrice（）{
 return price; 
} 
 
 int Item :: getOrderWeight（）{
 return weight; 
} 
 
 string Item :: getDescription（）{
 return description; 
} 
 
 int Item :: getQuantity（）{
 return quantity; 
} 
 
 void Item :: show（）{
 cout<价格<重量<描述; 
} 
  

这是我的主要档案：

  #include< iostream> 
 #include< string> 
 #includeItem.h
 using namespace std; 
 
 int main（）{
 double dTotalPrice = 0.0; 
 int iTotalWeight = 0; 
项目itmMouse（24.99，14，无线鼠标）; 
 Item itmKeyboard（22.49，27，USB Keyboard）; 
项目itmHDMI（24.99，12，HDMI电缆）; 
 Item itmGlasses（7.99，7，Reading Glasses）; 
 itmGlasses.setQuantity（2）; 
 //使用printDetails（）显示订单的详细信息
 cout<< 这是你的购物车内容。 
 itmMouse.show（）; 
 itmKeyboard.show（）; 
 itmHDMI.show（）; 
 itmGlasses.show（）; 
 //计算本节中的总价格和总重量
 dTotalPrice + = itmMouse.getOrderPrice（）; 
 dTotalPrice + = itmKeyboard.getOrderPrice（）; 
 dTotalPrice + = itmHDMI.getOrderPrice（）; 
 dTotalPrice + = itmGlasses.getOrderWeight（）; 
 iTotalWeight + = itmGlasses.getOrderPrice（）; 
 iTotalWeight + = itmKeyboard.getOrderWeight（）; 
 iTotalWeight + = itmHDMI.getOrderWeight（）; 
 iTotalWeight + = itmGlasses.getOrderWeight（）; 
 //这里我们显示订单详细信息
 cout< 你的订单的价格是$< dTotalPrice<< endl; 
 cout< 运输重量是< iTotalWeight< ounces \\\
; 
 cout< 这是< iTotalWeight / 16< pounds\\\
; 
 
 return 0; 
 
} 
  

我有兴趣知道我在哪里错了。

提前感谢！

解决方案

在您的.h档案中：

 code> Item :: Item（double OrderPrice，int OrderWeight，string Description）; 
  

应为：

  Item（double OrderPrice，int OrderWeight，string Description）; 
  

不需要限定第二个构造函数。

另请注意：

  int Item :: getOrderPrice（）{
 return price; 
} 
  

价格是 double ，并返回 int 。最后：

  iTotalWeight + = itmGlasses.getOrderPrice（）; 
  

您正在为您的体重添加价格 - 可能不是您想要的。 p>

最后，您不是将您的item（）构造函数中的值存储在任何var中。请在item.cpp文件构造函数中使用初始化器列表：

  Item :: Item（double OrderPrice，int OrderWeight，string Description） ：
 description（Description），
 price（OrderPrice），
 weight（OrderWeight），
 quantity（1）
 ... 
  

编译器警告/错误标记了所有这些问题...

I think that I was reasonably able to fix my code so it would compile, but something is still off about it.

This is my .h file

#pragma once
#include <string>
using namespace std;

class Item 
{
private: 
 string description;
 double price;
 int weight;
 int quantity;

public:
 Item(void);
 ~Item(void);
 Item::Item(double OrderPrice, int OrderWeight, string Description);
 void setOrderPrice(double amount);
 void setOrderWeight(int ounces);
 void setDescription(string desc);
 void setQuantity(int number);

 int getOrderPrice();
 int getOrderWeight();
 string getDescription();
 int getQuantity();

 void show();
 };

This is my .cpp file:

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

Item::Item(void)
{
}

Item::Item(double OrderPrice, int OrderWeight, string Description)
{
}

Item::~Item(void)
{
}

void Item::setOrderPrice(double amount) {
 price = amount;
}

void Item::setOrderWeight(int ounces) {
 weight = ounces;
}

void Item::setDescription(string desc) {
 description = desc;
}

void Item::setQuantity(int number) {
 quantity = number;
}

int Item::getOrderPrice() {
 return price;
}

 int Item::getOrderWeight() {
 return weight;
 }

 string Item::getDescription() {
 return description;
 }

 int Item::getQuantity() {
 return quantity;
 }

 void Item::show() {
 cout << price << weight << description;
 } 

This is my main file:

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

 int main() {
double dTotalPrice = 0.0;
int iTotalWeight = 0;
Item itmMouse(24.99, 14, "Wireless Mouse");
Item itmKeyboard(22.49, 27, "USB Keyboard");
Item itmHDMI (24.99, 12, "HDMI Cable");
Item itmGlasses(7.99, 7, "Reading Glasses");
itmGlasses.setQuantity(2);
// Show the details of the order using printDetails() 
cout << "Here are your shopping cart contents.\n";
itmMouse.show();
itmKeyboard.show();
itmHDMI.show();
itmGlasses.show();
// Compute the total price and total weight in this section
dTotalPrice += itmMouse.getOrderPrice();
dTotalPrice += itmKeyboard.getOrderPrice();
dTotalPrice += itmHDMI.getOrderPrice();
dTotalPrice += itmGlasses.getOrderWeight();
iTotalWeight += itmGlasses.getOrderPrice();
iTotalWeight += itmKeyboard.getOrderWeight();
iTotalWeight += itmHDMI.getOrderWeight();
iTotalWeight += itmGlasses.getOrderWeight();
// Here we show the order details
cout << "The price of your order is $ " << dTotalPrice << endl;
cout << "The shipping weight is " << iTotalWeight << " ounces\n";
cout << "That is " << iTotalWeight / 16 << " pounds\n";

return 0;

 }

I am interested in knowing where I went wrong.

Thanks in advance!

解决方案

In your .h file:

Item::Item(double OrderPrice, int OrderWeight, string Description);

Should be :

Item(double OrderPrice, int OrderWeight, string Description);

No need to qualify the second constructor.

Also note:

int Item::getOrderPrice() {
  return price;
}

Price is a double and you are returning an int. Finally:

iTotalWeight += itmGlasses.getOrderPrice();

You are adding a "Price" to your "Weight" - probably not what you wanted.

Last, you are not storing your values from your item() constructor in any of your vars. use an initializer list in your item.cpp file constructor:

Item::Item(double OrderPrice, int OrderWeight, string Description):
    description(Description),
    price(OrderPrice),
    weight(OrderWeight),
    quantity(1)
...

Compiler warnings/errors flagged all these issues for me...

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