C++继承

1#include <iostream>
  2#include <string.h>
  3#include <stdio.h>
  4using namespace std;
  5class student
  6{
  7    public:
  8        char name[100];
  9        int number;
 10        double English,Math,Computer;
 11        void inputPublicGreat()
 12        {
 13            cout << "输入英语成绩:";
 14            cin >> English;
 15            cout << "输入数学成绩:";
 16            cin >> Math;
 17            cout << "输入编程成绩:";
 18            cin >> Computer;
 19        }
 20        void inputInformation()
 21        {
 22            cout <<"输入学号:";
 23            cin >> number;
 24            cout <<"输入姓名:";
 25            cin >> name;
 26        }
 27        double calTotalGreat()
 28        {
 29            double Total=English+Math+Computer;
 30            return Total;
 31        }
 32        double calAveGreat()
 33        {
 34            double Ave=(English+Math+Computer)/3.0;
 35            return Ave;
 36        }
 37        void TPrint()
 38        {
 39            cout << endl;
 40            cout << "学号:" << number << endl;
 41            cout << "姓名:" << name << endl;
 42            cout << "English:"<<English <<" Math:"<<Math <<" Computer:"<< Computer << endl;
 43            cout <<"公共课总分成绩为：" <<calTotalGreat() << endl;
 44            cout <<"公共课平均成绩为："<<calAveGreat()<<endl;
 45        }
 46};
 47class Cstudent:public student
 48{
 49    public:
 50        double DB,C,CstuTotal;
 51        void inputCstudentGreat()
 52        {
 53            cout << "输入数据库成绩:";
 54            cin >> DB;
 55            cout << "输入C语言成绩:";
 56            cin >> C;
 57        }
 58        void outputCstudentGreat()
 59        {
 60            cout << "数据库:" <<DB <<" "<<"程序设计:" <<C <<endl;
 61        }
 62        void notice()
 63        {
 64            cout << "请录入计算机专业学生信息:"<< endl;
 65        }
 66        void calCstudentGreat()
 67        {
 68            CstuTotal=DB+C+calTotalGreat();
 69        }
 70        void Print()
 71        {
 72            cout <<name << "的总成绩为：" << CstuTotal << endl;
 73        }
 74};
 75class Astudent:public student
 76{
 77    public:
 78        double Acc,Eco,AstuTotal;
 79        void inputAstudentGreat()
 80        {
 81            cout << "输入会计学成绩:";
 82            cin >> Acc;
 83            cout << "输入经济学成绩:";
 84            cin >> Eco;
 85        }
 86        void outputAstudentGreat()
 87        {
 88            cout << "会计学:" <<Acc <<" "<<"经济学:" <<Eco <<endl;
 89        }
 90        void notice()
 91        {
 92            cout << "请录入会计学专业学生信息:"<< endl;
 93        }
 94        void calAstudentGreat()
 95        {
 96            AstuTotal=Acc+Eco+calTotalGreat();
 97        }
 98        void Print()
 99        {
100            cout <<name <<"的总成绩为：" << AstuTotal << endl;
101        }
102};
103class Hstudent:public student
104{
105    public:
106        double OrgH,Hana,HstuTotal;
107        void inputHstudentGreat()
108        {
109            cout << "输入有机化学成绩:";
110            cin >> OrgH;
111            cout << "输入化学分析成绩:";
112            cin >> Hana;
113        }
114        void outputHstudentGreat()
115        {
116            cout << "有机化学:" <<OrgH <<" "<<"化学分析:" <<Hana <<endl;
117        }
118        void notice()
119        {
120            cout << "请录入化学专业学生信息:"<< endl;
121        }
122        void calHstudentGreat()
123        {
124            HstuTotal=OrgH+Hana+calTotalGreat();
125        }
126        void Print()
127        {
128            cout << name<<"的总成绩为：" << HstuTotal << endl;
129        }
130};
131int main()
132{
133    int choice;
134    char flag;
135    while(1)
136    {
137        cout <<"请选择你要录入的学生专业:(1.计算机 2.会计学 3.化学):";
138        cin >> choice;
139        switch(choice)
140        {
141            case 1:
142            {
143                Cstudent cstu;
144                cstu.notice();
145                cstu.inputInformation();
146                cstu.inputPublicGreat();
147                cstu.inputCstudentGreat();
148                cstu.calTotalGreat();
149                cstu.calAveGreat();
150                cstu.calCstudentGreat();
151                cstu.TPrint();
152                cstu.outputCstudentGreat();
153                cstu.Print();
154                cout << endl;
155                cout << "你还要再录入其他学生成绩吗？(Y/N):";
156                cin >> flag;
157                if(flag=='N') goto label;
158                break;
159            }
160            case 2:
161            {
162                Astudent astu;
163                astu.notice();
164                astu.inputInformation();
165                astu.inputPublicGreat();
166                astu.inputAstudentGreat();
167                astu.calTotalGreat();
168                astu.calAveGreat();
169                astu.calAstudentGreat();
170                astu.TPrint();
171                astu.outputAstudentGreat();
172                astu.Print();
173                cout << endl;
174                cout << "你还要再录入其他学生成绩吗？(Y/N):";
175                cin >> flag;
176                if(flag=='N') goto label;
177                break;
178            }
179            case 3:
180            {
181                Hstudent hstu;
182                hstu.notice();
183                hstu.inputInformation();
184                hstu.inputPublicGreat();
185                hstu.inputHstudentGreat();
186                hstu.calTotalGreat();
187                hstu.calAveGreat();
188                hstu.calHstudentGreat();
189                hstu.TPrint();
190                hstu.outputHstudentGreat();
191                hstu.Print();
192                cout << endl;
193                cout << "你还要再录入其他学生成绩吗？(Y/N):";
194                cin >> flag;
195                if(flag=='N') goto label;
196                break;
197            }
198        }
199    }
200    label:
201    return 0;
202}
203

原文链接: https://www.cnblogs.com/markliu/archive/2012/05/11/2495945.html

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