我正在尝试探索命名空间并尝试像在 C 中那样创建示例库。我从未在 C++ 中这样做过,所以这就是我正在做的事情。这是我的代码,它工作正常,我想把它放在单独的文件中。
#include <iostream>
#include <string>
namespace TCS{
class employee{
int uID;
std::string name;
public:
employee(const int& uId, const std::string& name)
{
this->uID=uId;
(this->name).assign(name);
}
int getID()
{
return uID;
}
std::string getName()
{
return name;
}
};
}
using namespace std;
class employee{
int uID;
string name;
public:
employee(const int& uId, const string& name)
{
this->uID=uId;
(this->name).assign(name);
}
int getID()
{
return uID;
}
string getName()
{
return name;
}
};
int main()
{
employee TechMEmp1(1,"Andrew");
TCS::employee TCSEmp1(1,"Thomas");
cout << "Tech M Employee is :- ID : " << TechMEmp1.getID() << " Name : "
<< TechMEmp1.getName() << endl;
cout << "TCS Employee is :- ID : " << TCSEmp1.getID() << " Name : "
<< TCSEmp1.getName() << endl;
return 0;
}
现在我只是想复制我将内容放在 C 中的单独文件中的方式。我创建了一个包含内容的文件 TCS.h:
#ifndef TCS_HEADER
#define TCS_HEADER
namespace TCS{
class employee{
int uID;
std::string name;
public:
employee(const int& uId, const std::string& name);
int getID();
std::string getName();
};
}
#endif
另一个文件:带有内容的 TCSNamespace.cpp
#include "TCS.h"
#include <string>
TCS::employee(const int& uId, const std::string& name);
{
this->uID=uId;
(this->name).assign(name);
}
int TCS::getID();
{
return uID;
}
std::string TCS::getName();
{
return name;
}
我包含 main 的最终文件是:
#include <iostream>
#include <string>
#include "TCS.h"
using namespace std;
class employee{
int uID;
string name;
public:
employee(const int& uId, const string& name)
{
this->uID=uId;
(this->name).assign(name);
}
int getID()
{
return uID;
}
string getName()
{
return name;
}
};
int main()
{
employee TechMEmp1(1,"Andrew Thomas");
TCS::employee TCSEmp1(1,"Thomas Hula");
cout << "Tech M Employee is :- ID : " << TechMEmp1.getID() << " Name : "
<< TechMEmp1.getName() << endl;
cout << "TCS Employee is :- ID : " << TCSEmp1.getID() << " Name : "
<< TCSEmp1.getName() << endl;
return 0;
}
我正在使用 Cygwin 并尝试单独编译文件,当我输入命令时: g++ -Wall -c TCSNamespace.cpp (我认为这将编译我的 TCSNamespace.cpp 它编译 c 文件的方式)我得到:
$ g++ -Wall -c TCSNamespace.cpp
In file included from TCSNamespace.cpp:1:
TCS.h:6: error: using-declaration for non-member at class scope
TCS.h:6: error: expected `;' before "name"
TCS.h:8: error: expected unqualified-id before '&' token
TCS.h:8: error: expected `,' or `...' before '&' token
TCS.h:8: error: ISO C++ forbids declaration of `parameter' with no type
TCS.h:10: error: using-declaration for non-member at class scope
TCS.h:10: error: expected `;' before "getName"
TCSNamespace.cpp:4: error: expected constructor, destructor, or type conversion before ';' token
TCSNamespace.cpp:5: error: expected unqualified-id before '{' token
TCSNamespace.cpp:5: error: expected `,' or `;' before '{' token
TCSNamespace.cpp:9: error: `int TCS::getID()' should have been declared inside `TCS'
TCSNamespace.cpp:10: error: expected unqualified-id before '{' token
TCSNamespace.cpp:10: error: expected `,' or `;' before '{' token
TCSNamespace.cpp:13: error: `std::string TCS::getName()' should have been declared inside `TCS'
TCSNamespace.cpp:14: error: expected unqualified-id before '{' token
TCSNamespace.cpp:14: error: expected `,' or `;' before '{' token
我打算做的是单独编译 TCSNamespace.cpp 和 Namespace.cpp 然后链接它们以获得使用以下命令的可执行文件:
g++ -Wall -c TCSNamespace.cpp
g++ -Wall -c Namespace.cpp
gcc TCSNamespace.o Namespace.o –o Namespace
谁能告诉我哪里出错了?我还想知道在 C++ 中创建“TCS.h”的方式与在 C 中完成的方式相同,这是一种好的做法,因为 C++ 使用标头类型。
谢谢