#includeusing namespace std;class Tx{public:Tx(int i,int j);~Tx();ﻩvoid display();private:ﻩint num1,num2;};Tx::Tx(int i,int j=10){num1=i;num2=j;cout<<"Constructing"<#include #include using namespace std;class person{public: void in_nm(); void in_id(); void ou_nm(); void ou_id();private: string id; string name;};class student:public person{public: void in_clsid(); void in_sc(); void ou_clsid(); void ou_sc();private: string cls_id; float score;};class teacher:public person{public: void in_zc(); void in_dp(); void ou_zc(); void ou_dp();priva...