C++ OOP编程

Question

project1.cpp

#include "stdafx.h" 
#include "Bicycle.cpp" 
using namespace std; 

int _tmain(int argc, _TCHAR* argv[]) 
{ 
    bool runP = true; 
    do { 
    Bicycle object(); 
    char oType; 
    cout << "Would you like a (B)icycle, or (A)nimal? E for Exit\n"; 
    cin >> oType; 

    if (oType == 'B' || oType == 'b') { 
     int seat, wheels; 
     string brand; 
     cout << "How many wheels does the bike have?\n"; 
     cin >> wheels; 
     object().setWheels(wheels); 
     cout << "How many seats does the bike have?\n"; 
     cin >> seat; 
     object().setSeats(seat); 
     cout << "What is the brand of the bike?\n"; 
     cin >> brand; 
     object().setBrand(brand); 
     object().toString(); 
    } else if (oType == 'A' || oType == 'a') { 
    } else if (oType == 'e' || oType == 'E') { 
     runP = false; 
    } 

    } while (runP == true); 
    return 0; 
} 

Bicycle.h

#include <string> 

class Bicycle { 

private: 
    int wheels; 
    int seats; 
    std::string brand; 
public: 
    Bicycle(); 
    Bicycle(int w, int s, std::string b); 
    int getWheels(); 
    int getSeats(); 
    std::string getBrand(); 
    void setWheels(int w); 
    void setSeats(int s); 
    void setBrand(std::string b); 
    void toString(); 

}; 

Bicycle.cpp

#include "stdafx.h" 
#include "Bicycle.h" 
#include <string> 


    Bicycle::Bicycle() { 
    } 
    Bicycle::Bicycle(int w, int s, std::string b) { 
    } 
    int Bicycle::getWheels() { 
     return wheels; 
    } 
    int Bicycle::getSeats() { 
     return seats; 
    } 
    std::string Bicycle::getBrand() { 
     return brand; 
    } 
    void Bicycle::setWheels(int w) { 
     wheels = w; 
    } 
    void Bicycle::setSeats(int s) { 
     seats = s; 
    } 
    void Bicycle::setBrand(std::string b) { 
     brand = b; 
    } 
    void Bicycle::toString(){ 
     std::cout << "Bike object has: Brand: " << getBrand() << ", wheels: " << getWheels() << ", seats: " << getSeats() << "\n"; 
    } 

stdaf x.h

#pragma once 

#include "targetver.h" 
#include <stdio.h> 
#include <tchar.h> 
#include <iostream> 

错误：

1>------ Build started: Project: project1, Configuration: Debug Win32 ------ 
1> stdafx.cpp 
1> Bicycle.cpp 
1> Generating Code... 
1> Compiling... 
1> project1.cpp 
1> Generating Code... 
1> Skipping... (no relevant changes detected) 
1> Window.cpp 
1> Animal.cpp 
1>project1.obj : error LNK2005: "public: __thiscall Bicycle::Bicycle(void)" (??0Bicycle@@QAE@XZ) already defined in Bicycle.obj 
1>project1.obj : error LNK2005: "public: __thiscall Bicycle::Bicycle(int,int,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (??0Bicycle@@QAE@HHV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) already defined in Bicycle.obj 
1>project1.obj : error LNK2005: "public: int __thiscall Bicycle::getWheels(void)" (?getWheels@Bicycle@@QAEHXZ) already defined in Bicycle.obj 
1>project1.obj : error LNK2005: "public: int __thiscall Bicycle::getSeats(void)" (?getSeats@Bicycle@@QAEHXZ) already defined in Bicycle.obj 
1>project1.obj : error LNK2005: "public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall Bicycle::getBrand(void)" (?getBrand@Bicycle@@QAE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) already defined in Bicycle.obj 
1>project1.obj : error LNK2005: "public: void __thiscall Bicycle::setWheels(int)" (?setWheels@Bicycle@@QAEXH@Z) already defined in Bicycle.obj 
1>project1.obj : error LNK2005: "public: void __thiscall Bicycle::setSeats(int)" (?setSeats@Bicycle@@QAEXH@Z) already defined in Bicycle.obj 
1>project1.obj : error LNK2005: "public: void __thiscall Bicycle::setBrand(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?setBrand@Bicycle@@QAEXV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) already defined in Bicycle.obj 
1>project1.obj : error LNK2005: "public: void __thiscall Bicycle::toString(void)" (?toString@Bicycle@@QAEXXZ) already defined in Bicycle.obj 
1>project1.obj : error LNK2019: unresolved external symbol "class Bicycle __cdecl object(void)" (?object@@YA?AVBicycle@@XZ) referenced in function _wmain 
1>C:\Users\Hash\Documents\Visual Studio 2010\Projects\project1\Debug\project1.exe : fatal error LNK1120: 1 unresolved externals 
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== 

Answer 1

相当肯定的，而不是

#include "Bicycle.cpp" 

你想

#include "Bicycle.h" 

随着第一，一切都在Bicycle.cpp得到复制粘贴到project1.cpp，你会得到一个组的自行车功能定义重复定义当编译project1.cpp时，另一个是编译Bicycle.cpp时。

Answer 2

project1.cpp应该

#include "bicycle.h" 

不

#include "bicycle.cpp"