# include <iostream.h>
# include <string.h>
class CPerson
{
protected:
    string name;
    int age;
public:
    CPerson(string n,int a);
    CPerson ()
    {
        cout<<"\n什么也不能做的CPerson构造函数\n";}
    void WritePerson()
    {
        cout<< name<<"年龄为"<<age<<"\n";}
        ~CPerson()
        {
            cout<<"\n销毁CPerson对象\n";
        }
    };
    CPerson::CPerson (string n,int a)
    {
        cout<<"\n在CPerson构造函数中\n";
        name=n;
        age=a;
        WritePerson();
        cout<<"离开CPerson构造函数\n";
    }
    int main()
    {
        CPerson somebody("Vicent",29);
        cout<<"\n没有人了\n\n";
        return 0;
    }
我用VC++6.0编译时出现了以下错误提示：
:\vc\MSDev98\MyProjects\first18\01.cpp(6) : error C2146: syntax error : missing ';' before identifier 'name'
F:\vc\MSDev98\MyProjects\first18\01.cpp(6) : error C2501: 'string' : missing storage-class or type specifiers
F:\vc\MSDev98\MyProjects\first18\01.cpp(6) : error C2501: 'name' : missing storage-class or type specifiers
F:\vc\MSDev98\MyProjects\first18\01.cpp(9) : error C2629: unexpected 'class CPerson ('
F:\vc\MSDev98\MyProjects\first18\01.cpp(9) : error C2238: unexpected token(s) preceding ';'
F:\vc\MSDev98\MyProjects\first18\01.cpp(21) : error C2065: 'string' : undeclared identifier
F:\vc\MSDev98\MyProjects\first18\01.cpp(21) : error C2146: syntax error : missing ')' before identifier 'n'
F:\vc\MSDev98\MyProjects\first18\01.cpp(21) : error C2350: 'CPerson::CPerson::CPerson' is not a static member
F:\vc\MSDev98\MyProjects\first18\01.cpp(21) : error C2059: syntax error : ')'
F:\vc\MSDev98\MyProjects\first18\01.cpp(22) : error C2143: syntax error : missing ';' before '{'
F:\vc\MSDev98\MyProjects\first18\01.cpp(22) : error C2447: missing function header (old-style formal list?)
F:\vc\MSDev98\MyProjects\first18\01.cpp(31) : error C2661: 'CPerson::CPerson' : no overloaded function takes 2 parameters
执行 cl.exe 时出错.

first18.exe - 1 error(s), 0 warning(s)

# include <iostream>
# include <string>

using namespace std;

class CPerson
{
protected:
    string name;
    int age;
public:
    CPerson(string n,int a);
    CPerson ()
    {
        cout<<"\n什么也不能做的CPerson构造函数\n";}
    void WritePerson()
    {
        cout<<name.c_str()<<"年龄为"<<age<<"\n";}
        ~CPerson()
        {
            cout<<"\n销毁CPerson对象\n";
        }
    };
    CPerson::CPerson (string n,int a)
    {
        cout<<"\n在CPerson构造函数中\n";
        name=n;
        age=a;
        WritePerson();
        cout<<"离开CPerson构造函数\n";
    }
    int main()
    {
        CPerson somebody("Vicent",29);
        cout<<"\n没有人了\n\n";
        return 0;
    }

学习一下有关名字空间的东东~~

可否告诉我为什么要这么改，多谢了。

# include <iostream.h>
# include <string.h>
using namespace srd;//这里加上命名空间

class CPerson
{
protected:
    string name;
    int age;
public:
    CPerson(string n,int a);
    CPerson ()
    {
        cout<<"\n什么也不能做的CPerson构造函数\n";}
    void WritePerson()
    {
        cout<< name<<"年龄为"<<age<<"\n";}
        ~CPerson()
        {
            cout<<"\n销毁CPerson对象\n";
        }
    };
    CPerson::CPerson (string n,int a)
    {
        cout<<"\n在CPerson构造函数中\n";
        name=n;
        age=a;
        WritePerson();
        cout<<"离开CPerson构造函数\n";
    }
    int main()
    {
        CPerson somebody("Vicent",29);
        cout<<"\n没有人了\n\n";
        return 0;
    }

#include<iostream>
#include<string>
using namespace std;

class CPerson
{
protected:
    string name;
    int age;
public:
    CPerson(string n,int a);
    CPerson ()
    {
        cout<<"\n什么也不能做的CPerson构造函数\n";
    }
    void WritePerson()
    {
        cout<< name<<"年龄为"<<age<<"\n";
    }
     ~CPerson()
     {
         cout<<"\n销毁CPerson对象\n";
     }
   
};
    CPerson::CPerson (string n,int a)
    {
        cout<<"\n在CPerson构造函数中\n";
        name=n;
        age=a;
        WritePerson();
        cout<<"离开CPerson构造函数\n";
    }


    int main()
    {
        CPerson somebody("Vicent",29);
        cout<<"\n没有人了\n\n";
        return 0;
    }

这样就可以了

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

<iostream>表示你使用的是标注命名空间，也就是在程序开始应该有这么一句话
using namespace std ;
这是遵循c++标准的
<iostream.h>
则没有遵循c++标准
<string.h>是旧的C头文件，对应的是基于char*的字符串处理函数；
<string>是包装了std的C++头文件，对应的是新的strng类；