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C++编译系统只执行最后的派生类对虚基类的构造函数的调用,而忽略虚基类的其他派生类对虚基类的构造函数的调用,这就保证了虚基类的数据成员不会被多次初始化。
/*多重继承派生类-虚基类*/
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;
class Person//基类-人
{
public:
Person(int nian, string xing)//带参数构造函数,nian-年龄,xing-性别
{
age = nian;
sex = xing;
}
protected:
int age;
string sex;
};
class Teacher:virtual public Person//派生类-老师
{
public:
Teacher(int nian, string xing, int bianhao, string zhichen) :Person(nian, xing)
{
num = bianhao;
titl = zhichen;
}
protected:
int num;
string titl;
};
class Student:virtual public Person//派生类-学生
{
public:
Student(int nian, string xing, int fenshu) :Person(nian, xing)
{
sorce = fenshu;
}
protected:
int sorce;
};
class Graduate:public Teacher,public Student//派生类-在职研究生
{
public:
Graduate(int nian, string xing,int bianhao,string zhichen,int fenshu, int jintie) :Person(nian, xing), Teacher(nian, xing,bianhao, zhichen), Student(nian,xing,fenshu), wage(jintie){}
void print();
private:
int wage;
};
void Graduate::print()
{
cout << age << setw(10) << sex << setw(10) << num << setw(10) << titl << setw(10)<< sorce << setw(10) << wage << setw(10) << endl;
}
int main()//主函数
{
Graduate zhou(25,"man",2018,"xuesheng",99,500);//初始化
zhou.print();
system("pause");
return 0;
}