我一直在使用这个代码在我的OvernightPackage.h文件中处理一个小错误。 OvernightPackage继承自超类Package，但它不断抛出错误：“期望的类名”我还有另一个类TwoDayPackage，它继承得很好，我无法弄清楚它们两者之间有什么不同。
继承我的代码：
的main.cpp
//============================================================================
// Name : Assignment4.cpp
//============================================================================
#include <iostream>
#include <fstream>
#include <string>
#include "Person.h"
#include "Package.h"
#include "TwoDayPackage.h"
#include "OvernightPackage.h"
void readFile(char & c, int & i, double & d, double & ed, string attributes[]){
ifstream input;
input.open("package.txt");
input >> c;
input >> i;
input >> d;
for(int i = 0; i < 10; i++){
input >> attributes[i];
}
switch(c){
case('o'):
case('O'):
case('t'):
case('T'):
input >> ed;
break;
}
}
void printLabel(Package item){
cout << "********* Shipping Label *******" << endl << endl;
cout << "Delivery Cost: " << item.costToDeliver() << endl;
cout << "The package will arrive at its destination in " << item.timeToDeliver() << " days.";
cout << "From:\n";
cout << item.getSenderName() << endl;
cout << item.getSenderAddress() << endl;
cout << item.getSenderCity() << "," << item.getSenderState() << " " << item.getSenderZip() << endl ;
cout << "Ship To:\n";
cout << item.getRecieverName() << endl;
cout << item.getRecieverAddress() << endl;
cout << item.getRecieverCity() << "," << item.getRecieverState() << " " << item.getRecieverZip() << endl ;
cout << "\n******************************";
}
int main() {
char packageType;
int weight;
double costPerOunce, extraData;
string attributes[10];
readFile(packageType, weight, costPerOunce, extraData, attributes);
Person sender = Person(attributes[0],attributes[1],attributes[2],attributes[3],attributes[4]);
Person receiver = Person(attributes[5],attributes[6],attributes[7],attributes[8],attributes[9]);
Package package;
switch(packageType){
case('p'):
case('P'):
package = Package(weight,costPerOunce);
break;
case('o'):
case('O'):
package = OvernightPackage(weight,costPerOunce,extraData);
break;
case('t'):
case('T'):
package = TwoDayPackage(weight,costPerOunce,extraData);
break;
}
package.setSender(sender);
package.setReceiver(receiver);
printLabel(package);
}
Person.h
/*
* Person.h
*
* Created on: Feb 20, 2014
* Author: Nate Ashby
*/
#ifndef PERSON_H_
#define PERSON_H_
using namespace std;
class Person{
public:
Person();
Person(string name, string address, string city, string state, string zip);
string getName();
string getAddress();
string getCity();
string getState();
string getZip();
private:
string name;
string address;
string city;
string state;
string zip;
};
#endif /* PERSON_H_ */
Person.cpp
/*
* Person.cpp
*
* Created on: Feb 20, 2014
* Author: Nate Ashby
*/
#include "Person.h"
using namespace std;
Person::Person(){
name = "Empty";
address = "Empty";
city = "Empty";
state = "Empty";
zip = "Empty";
};
Person::Person(string name, string address, string city, string state, string zip){
this->name = name;
this->address = address;
this->city = city;
this->state = state;
this->zip = zip;
};
string Person::getName(){return name;};
string Person::getAddress(){return address;};
string Person::getCity(){return city;};
string Person::getState(){return state;};
string Person::getZip(){return zip;};
Package.h
/*
* Package.h
*
* Created on: Feb 20, 2014
* Author: Nate Ashby
*/
#ifndef PACKAGE_H_
#define PACKAGE_H_
class Package{
public:
Package();
Package(int ounces, double costPerOunce);
int getWeight();
double getCostPerOunce();
Person getSender();
Person getReciever();
void setWeight(int);
void setCostPerOunce(double);
void setSender(Person);
void setReceiver(Person);
double costToDeliver();
std::string timeToDeliver();
friend class Person;
std::string getSenderName();
std::string getSenderAddress();
std::string getSenderCity();
std::string getSenderState();
std::string getSenderZip();
std::string getRecieverName();
std::string getRecieverAddress();
std::string getRecieverCity();
std::string getRecieverState();
std::string getRecieverZip();
protected:
int ounces;
double costPerOunce;
Person Sender;
Person Reciever;
};
Package.cpp
/*
* Person.cpp
*
* Created on: Feb 20, 2014
* Author: Nate Ashby
*/
#include "Person.h"
using namespace std;
Person::Person(){
name = "Empty";
address = "Empty";
city = "Empty";
state = "Empty";
zip = "Empty";
};
Person::Person(string name, string address, string city, string state, string zip){
this->name = name;
this->address = address;
this->city = city;
this->state = state;
this->zip = zip;
};
string Person::getName(){return name;};
string Person::getAddress(){return address;};
string Person::getCity(){return city;};
string Person::getState(){return state;};
string Person::getZip(){return zip;};
TwoDayPackage.h
/*
* TwoDayPackage.h
*
* Created on: Feb 20, 2014
* Author: Nate Ashby
*/
#ifndef TWODAYPACKAGE_H_
#define TWODAYPACKAGE_H_
class TwoDayPackage : public Package{
public:
TwoDayPackage();
TwoDayPackage(int,double,double);
void setIncrease(double);
double getIncrease();
private:
double costPerOunceIncrease;
};
#endif /* TWODAYPACKAGE_H_ */
TwoDayPackage.cpp
/*
* TwoDayPackage.cpp
*
* Created on: Feb 20, 2014
* Author: Nate Ashby
*/
#include "TwoDayPackage.h"
TwoDayPackage::TwoDayPackage(){
ounces = 0;
costPerOunce = 0;
costPerOunceIncrease = 0;
};
TwoDayPackage::TwoDayPackage(int weight, double cost, double rateIncrease){
ounces = weight;
costPerOunce = cost;
costPerOunceIncrease = rateIncrease;
};
void TwoDayPackage::setIncrease(double rateIncrease){ costPerOunceIncrease = rateIncrease;};
double TwoDayPackage::getIncrease(){return costPerOunceIncrease;};
double TwoDayPackage::costToDeliver(){return (ounces * (costPerOunce + costPerOunceIncrease));};
std::string timeToDeliver(){return "2";};
OvernightPackage.h
/*
* OvernightPackage.h
*
* Created on: Feb 20, 2014
* Author: Nate Ashby
*/
#ifndef OVERNIGHTPACKAGE_H_
#define OVERNIGHTPACKAGE_H_
class OvernightPackage : public Package{
public:
OvernightPackage();
OvernightPackage(int, double, double);
double getRate();
void setRate(double);
protected:
double flatRateIncrease;
};
#endif /* OVERNIGHTPACKAGE_H_ */
最后是OvernightPackage.cpp
/*
* OvernightPackage.cpp
*
* Created on: Feb 20, 2014
* Author: Nate Ashby
*/
#include "OvernightPackage.h"
OvernightPackage::OvernightPackage(){
ounces = 0;
costPerOunce = 0;
flatRateIncrease = 0;
}
OvernightPackage::OvernightPackage(int weight, double costPerOunce, double overnightIncrease){
this->ounces = weight;
this->costPerOunce = costPerOunce;
this->flatRateIncrease = overnightIncrease;
}
double OvernightPackage::getRate(){return flatRateIncrease;};
void OvernightPackage::setRate(double rate){flatRateIncrease = rate;};
double OvernightPackage::costToDeliver(){ return (ounces * costPerOunce + flatRateIncrease);};
std::string timeToDeliver(){return "1";};
答案 0 :(得分：1)
您的问题很可能是由于缺少包含。在继承的类中，您需要包含基类，因此添加
#include "Package.h"
到两个继承类。此外，Package.h需要Person.h的包含，并且自您使用以来，其中一些文件应包含<string>。
顺便说一下，在你的示例代码中，你发布了person.cpp应该是package.cpp的，而整个代码是长的。在下次发布之前，请阅读有关如何Short, Self Contained, Correct (Compilable), Example
的信息