我已经成功将派生类存放在基类类型的vector表中，也能定位位置，就是不知道怎么使用派生类的函数，只能用基类的函数，求解啊！
#include
#include
#include
#include
using namespace std;
class people
{
public:
people()
{
name = new char[20];
code = 0;
sex = new char[8];
number = new char[20];
};
bool people::operator==(const people &rhs) const
{
return (code == rhs.code);
};
void in_mess()
{
cout << "输入名字、编号、性别、身份证号" << endl;
cin >> name;
cin >> code;
cin >> sex;
cin >> number;
};
const int consttime = 10;
void out_mess()
{
cout << "名字：" << name << endl;
cout << "编号：" << code << endl;
cout << "性别：" << sex << endl;
cout << "身份证号：" << number << endl;
};
int seach()
{
return code;
};
void eq_SC(int a)
{
code = a;
}
private:
char *name;
int code;
char *sex;
char *number;
};
class student : virtual public people
{
public:
student(){};
friend istream&operator>>(istream&in, student &p)
{
p.in_mess();
return in;
};
void out_messs()
{
people::out_mess();
cout << "身份：学生" << endl;
cout << "总学时：" << consttime << endl;
}
};
class teacher :virtual public people
{
public:
teacher()
{
teachtime = 0;
};
friend istream&operator>>(istream&in, teacher &p)
{
p.in_mess();
cout << "身份：老师" << endl;
cout << "输入教学学时" << endl;
in >> p.teachtime;
return in;
}
void out_messs()
{
people::out_mess();
cout << "身份：老师" << endl;
cout << "总学时：" << teachtime + consttime << endl;
}
int get_TT()
{
return teachtime + consttime;
}
private:
int teachtime;
};
class graduate : virtual public student
{
public:
graduate()
{
freetime = 0;
};
friend istream&operator>>(istream&in, graduate &p)
{
p.in_mess();
cout << "身份：研究生" << endl;
cout << "输入自由研究时间" << endl;
in >> p.freetime;
return in;
}
void out_messs()
{
people::out_mess();
cout << "身份：研究生" << endl;
cout << "总学时:" << freetime + consttime << endl;
}
int get_FT()
{
return freetime+consttime;
}
private:
int freetime;
};
class TA : public graduate, public teacher
{
public:
TA()
{
resarch_time = 0;
};
friend istream&operator>>(istream&in, TA &p)
{
p.in_mess();
cout << "身份：助教" << endl;
cout << "输入做研究和一定教学工作学时" << endl;
in >> p.resarch_time;
return in;
};
void out_messs()
{
people::out_mess();
cout << "身份：助教" << endl;
cout << "总学时：" << resarch_time +consttime+get_FT()+get_TT() << endl;
};
private:
int resarch_time;
};
void main()
{
cout << "当前为空表，请输入第一个人员的信息" << endl;
cout << "插入身份为 1.学生 2.老师 3.研究生 4.助教 请输入序号" << endl;
int num=0;
people first;
cin >> num;
if (num == 1)
{
student first;
cin >> first;
}
else if (num == 2)
{
teacher first;
cin >> first;
}
else if (num == 3)
{
graduate first;
cin >> first;
}
else if (num == 4)
{
TA first;
cin >> first;
};
vector<people>::iterator location;//迭代子
vector<people>V(1, first);
while (1)
{
int gong;
cout << "请选择功能" << endl;
cout << "1.插入新的信息 2.查找 " << endl;
cin >> gong;
if (gong == 1)
{
cout << "插入身份为 1.学生 2.老师 3.研究生 4.助教 请输入序号" << endl;
int num;
cin >> num;
if (num == 1)
{
student human;
cin >> human;
V.push_back(human);
}
else if (num == 2)
{
teacher human;
cin >> human;
V.push_back(human);
}
else if (num == 3)
{
graduate human;
cin >> human;
V.push_back(human);
}
else if (num == 4)
{
TA human;
cin >> human;
V.push_back(human);
};
}
else if (gong == 2)
{
people _new;
int studycodee;
cout << "请输入他（她）的编号" << endl;
cin >> studycodee;
_new.eq_SC(studycodee);
location = find(V.begin(), V.end(), _new);
if (location != V.end())
{
V[location - V.begin()].out_mess();
}
else
cout << "未找到" << endl;
}
}
}
下面查找功能只能用到其基类的函数，用不到派生类的，我觉得是因为vector是存放的people类导致的，但是即使我将其派生并且重新放置派生类进去，它依然只认基类不认派生类函数啊！怎么办呀！
