一次C++作业与总结（注意日期，请同班同学略作更改，和我代码一样的话，我可和老师交代不清）c/c++TKDS的博客-

改错1

#include <iostream> #include<string> using namespace std; class CBase1 { public: CBase1() :a(a)//CBase1不存在默认构造函数，应删去括号内的int a，使系统生成默认构造函数 {         cout << "base1 structure..." << endl; } ~CBase1() {         cout << "base1 destructure ..." << endl; } void print() {         cout << "a=" << a << endl; } protected: int a; }; class CBase2 { public: CBase2() :b(b)//CBase2不存在默认构造函数，应删去括号内的int b，使系统生成默认构造函数 {         cout << "base2 structure..." << endl; } ~CBase2() {         cout << "base2 destructure..." << endl; } void print() {         cout << "b=" << b << endl; } protected: int b; }; class CDerive :public CBase1, public CBase2 { public: CDerive() {         cout << "derive structure..." << endl; } ~CDerive() {         cout << "derive destructure..." << endl; } void print() {         CBase1::print();         CBase2::print();         b1.print();         b2.print();         cout << "c=" << c << endl; } private:     CBase1 b1;     CBase2 b2; int c; }; int main()//main 的返回类型应为int {     CDerive d;     d.print();//调用函数时应加上括号 } 

改错2

#include<iostream> #include<string> using namespace std; class CBase { public: CBase(int a) :a(a) {} int a; }; class CDerive1 : public CBase { public: CDerive1(int a) :CBase(a) {} }; class CDerive2 : public CBase { public: CDerive2(int a) : CBase(a) {} }; class CDerive :public CDerive1, public CDerive2 { public: CDerive(int a, int b) :CDerive1(a), CDerive2(b) {} }; int main() {  CDerive d(1, 2);  cout << d.CDerive1::a << endl;  cout << d.CDerive2::a << endl; } 

建立普通的基类building，用来存储一座楼房的层数、房间数以及它的总平方数。建立派生类house，继承building，并存储卧室与浴室的数量，另外，建立派生类office，继承building，并存储灭火器与电话的数目。设计一主函数来测试以上类的用法。

#include <iostream> #include<string> using namespace std; class building { public: building(int f, int r, double a) { floors = f, rooms = r, area = a; } /*更改处：调用基类内的参数时应同名函数：到相应参数  void Building(int f, int r, int a)  {   floors = f;   rooms = r;   area = a;  }*/ void show() {   cout << "建筑层数" << floors << endl;   cout << "建筑房间数" << rooms << endl;   cout << "建筑总平方米数" << area << endl; } protected: int floors; int rooms; double area; }; class house :public building { public: house(int f, int r, double a, int bed, int bash) :building(f, r, a) {   bedrooms = bed;   bashrooms = bash; } void show() {   cout << "建筑层数" << floors << endl;   cout << "建筑房间数" << rooms << endl;   cout << "建筑总平方米数" << area << endl;   cout << "卧室数量" << bedrooms << endl;   cout << "浴室数量" << bashrooms << endl; } private: int bedrooms; int bashrooms; }; class office :public building { public: office(int f, int r, double a, int fire, int phone) :building(f, r, a) {   antifire = fire;   phones = phone; } void show() {   cout << "建筑层数" << floors << endl;   cout << "建筑房间数" << rooms << endl;   cout << "建筑总平方米数" << area << endl;   cout << "灭火器数量" << antifire << endl;   cout << "电话数量" << phones << endl; } private: int antifire; int phones; }; int main() {     building b1(8, 14, 2000.0);  b1.show();  cout << endl;  house h1(10, 20, 5000.0, 10, 20);  h1.show();  cout << endl;  office o1(12, 28, 8000.0, 40,100);  o1.show();@[TOC](这里写自定义目录标题) } 

• 按照下图的类层次结构编写程序，定义属于score的对象c1以及类teacher的对象t1，分别输入各个数据成员的值后再显示出这些数据。
  

#include<iostream> #include<string> using namespace std; class person { public: person(string n, string i) { name = n, id = i; } void printper() {   cout << "姓名：" << name << endl;   cout << "身份证号码：" << id << endl; } protected:  string name;  string id; }; class teacher :public person { public: teacher(string name ,string id,string deg, string dep) :person(name,id){ degree = deg, department = dep; } void printtea() { printper();//不能用void的形式   cout << "学位：" << degree << endl;   cout << "部门：" << department << endl; } private:  string degree;  string department; }; class student :public person { public: student(string n, string i, int old1, string sno1) :person(n, i) { old = old1, sno = sno1; } void printstu() { printper();   cout << "学生年龄：" << old << endl;   cout << "学生学号：" << sno << endl; } protected: int old;  string sno; }; class stud { public: stud(string addr, string tel) { address = addr, tellphone = tel; } void printstud() {   cout << "学生地址：" << address << endl;   cout << "学生电话号码：" << tellphone << endl; } protected:  string address;  string tellphone; }; class score :public stud, public student { public: score(string name,string id,int old,string sno,string address,string tellphone,float ma, float eng) : student( name,id,old,sno),stud(address,tellphone){ math = ma, english = eng; } void printsco() { printstu(); printstud();   cout << "数学成绩：" << math << endl;   cout << "英语成绩：" << english << endl; } private: float math; float english; }; int main() {  score c1( "张三","100100100101010011",19, "2019010101","北京海淀区","1234567890123", 100.0, 100.0);  c1.printsco();  cout << endl;  teacher t1("李四", "100100002222222222", "博士生导师", "法学院");  t1.printtea(); }