类的派生

  1 #include<iostream>
  2 #include<fstream>
  3 #include<string> 
  4 using namespace std;
  5 #define maxlen 100
  6 
  7 //---------------------------------基类-------------------------------------
  8 class Teacher{//基类
  9 public:
 10     //Teacher(string name,string position);
 11     virtual int CaleSalary() const = 0;//纯虚函数,计算教师工资
 12     virtual void Show() const = 0;//纯虚函数，输出教师的姓名、职称、工资
 13     string name;//姓名
 14     string position;//职称
 15     int Salary;//工资
 16 };
 17 //---------------------------------基类-------------------------------------
 18 
 19 
 20 //---------------------------------助教类-----------------------------------
 21 //助教
 22 class Assistant:public Teacher{
 23 public:
 24     Assistant(string name,string position);//构造函数
 25     virtual int CaleSalary()const ;//计算教师工资
 26      virtual void Show()const;//输出教师的姓名、职称、工资
 27 };
 28 
 29 //Assistant(助教)构造函数
 30 Assistant::Assistant(string Name,string Position)
 31 {
 32     name = Name;
 33     position = Position;
 34 }
 35 
 36 //Assistant(助教)//计算教师工资
 37 int Assistant::CaleSalary()const
 38 {
 39     int temp;
 40     if(position=="助教"){
 41         temp = 900;
 42     }else if(position=="讲师"){
 43         temp = 1000;
 44     }else if(position=="副教授"){
 45         temp = 1300;
 46     }else if(position=="教授"){
 47         temp = 1600;
 48     }
 49     
 50     return temp;
 51 
 52 }
 53 
 54 
 55 //Assistant(助教)//输出显示
 56 void Assistant::Show()const
 57 {
 58     cout<<"姓名: "<<name<<", 职称: "<<position<<", 工资: "<<Salary<<"元"<<endl;
 59 }
 60 
 61 
 62 //---------------------------------助教类-----------------------------------
 63 
 64 
 65 
 66 //---------------------------------讲师类-----------------------------------
 67 
 68 //讲师类
 69 class Lecture:public Teacher{
 70 public:
 71     Lecture(string name,string position);//构造函数
 72     virtual int CaleSalary()const;//计算教师工资
 73     virtual void Show()const;//输出教师的姓名、职称、工资
 74 };
 75 
 76 //Lecture(讲师)构造函数
 77 Lecture::Lecture(string Name,string Position)
 78 {
 79     name = Name;
 80     position = Position;
 81 }
 82 
 83 //Lecture(讲师)//计算教师工资
 84 int Lecture::CaleSalary()const
 85 {
 86     int temp;
 87     if(position=="助教"){
 88         temp = 900;
 89     }else if(position=="讲师"){
 90         temp = 1000;
 91     }else if(position=="副教授"){
 92         temp = 1300;
 93     }else if(position=="教授"){
 94         temp = 1600;
 95     }
 96     
 97     return temp;;
 98 }
 99 
100 
101 //Lecture(讲师)：输出显示
102 void Lecture::Show()const
103 {
104     cout<<"姓名: "<<name<<", 职称: "<<position<<", 工资: "<<Salary<<"元"<<endl;
105 }
106 //---------------------------------讲师类-----------------------------------
107 
108 
109 
110 
111 //---------------------------------副教授类---------------------------------
112 
113 //副教授类(AssociateProfessor)
114 class AssociateProfessor:public Teacher{
115 public:
116     AssociateProfessor(string name,string position);//构造函数
117     virtual int CaleSalary()const;//计算教师工资
118     virtual void Show()const;//输出教师的姓名、职称、工资
119 };
120 
121 //副教授类(AssociateProfessor)构造函数
122 AssociateProfessor::AssociateProfessor(string Name,string Position)
123 {
124     name = Name;
125     position = Position;
126 }
127 
128 //副教授类(AssociateProfessor)//计算教师工资
129 int AssociateProfessor::CaleSalary()const
130 {
131     int temp;
132     if(position=="助教"){
133         temp = 900;
134     }else if(position=="讲师"){
135         temp = 1000;
136     }else if(position=="副教授"){
137         temp = 1300;
138     }else if(position=="教授"){
139         temp = 1600;
140     }
141     
142     return temp;
143 }
144 
145 
146 //副教授类(AssociateProfessor)//输出显示
147 void AssociateProfessor::Show()const
148 {
149     cout<<"姓名: "<<name<<", 职称: "<<position<<", 工资: "<<Salary<<"元"<<endl;
150 }
151 //---------------------------------副教授类---------------------------------
152 
153 //---------------------------------教授类-----------------------------------
154 
155 //Proffessor(教授类)
156 class Proffessor:public Teacher{
157 public:
158     Proffessor(string name,string position);//构造函数
159     virtual int CaleSalary()const;//计算教师工资
160     virtual void Show()const;//输出教师的姓名、职称、工资
161 };
162 
163 //Proffessor(教授类)构造函数
164 Proffessor::Proffessor(string Name,string Position)
165 {
166     name = Name;
167     position = Position;
168 }
169 
170 int Proffessor::CaleSalary()const
171 {
172     int temp;
173     if(position=="助教"){
174         temp = 900;
175     }else if(position=="讲师"){
176         temp = 1000;
177     }else if(position=="副教授"){
178         temp = 1300;
179     }else if(position=="教授"){
180         temp = 1600;
181     }
182     
183     return temp;
184 }
185 
186 
187 //Proffessor(教授类)输出显示
188 void Proffessor::Show()const
189 {
190     cout<<"姓名: "<<name<<", 职称: "<<position<<", 工资: "<<Salary<<"元"<<endl;
191 }
192 //---------------------------------教授类-----------------------------------
193 
194 struct Total
195 {
196     string name;
197     string position;
198     int salary;
199 };
200 Total Data[maxlen];
201 int num;//几组数据
202 
203 void analyse(ifstream &in)
204 { 
205     int i;
206     string s="";//初始字符串s为空
207     char ch;//字符
208     string str[maxlen];//存放字符串
209     int count = 0;
210     while(!in.eof())//当文件没读完
211     {
212         ch=in.get();//读入字符
213         if(ch!=‘\n‘&&ch!=‘ ‘)//当前字符不死空格或者换行符
214         {
215             s +=ch;//加入到字符串尾部
216         }else {//是空格或换行符
217             str[count] =s;
218             count++;//计数+1
219             s ="";//字符冲为空
220         }
221      }
222 
223     num = 0;//统计行数
224     for(i=0;i<count;i=i+2)
225     {
226         Data[num].name = str[i];//姓名
227         Data[num].position = str[i+1];//职称
228         Data[num].salary = 0;//工资初始化为0
229         num++;//行数+1
230     }
231 }
232 
233 
234 int main() 
235 {  
236     int i;
237     ifstream in; 
238     ofstream out;
239 /*
240     char a[30];
241     cout<<"请输入文件名:";
242     cin>>a;
243     in.open(a,ios::in); //打开文件
244 */
245     in.open("D:/teacher.txt",ios::in); //打开文件
246     if(in.is_open()){
247         analyse(in);   
248         in.close();
249     }else printf("文件操作出错!\n"); 
250 
251     out.open("D:/Teache.txt");//将某些关键词替换后的字符串存到文件中
252      if(out.is_open())//打开文件
253     {
254         for( i=0;i<num;i++)
255         {
256             if(Data[i].position=="助教")
257             {
258                 Teacher  *assistant = new Assistant(Data[i].name,Data[i].position);
259                 assistant->Salary =assistant->CaleSalary();
260                 assistant->Show();
261                 out<<assistant->name;
262                 out<<" ";
263                 out<<assistant->position;
264                 out<<" ";
265                 out<<assistant->Salary;
266                 out<<"\n";
267      
268             }else if(Data[i].position=="讲师")
269             {
270                 Teacher *lecture = new Lecture(Data[i].name,Data[i].position);
271                 
272                 lecture->Salary =lecture->CaleSalary();
273                 lecture->Show();
274                 out<<lecture->name;
275                 out<<" ";
276                 out<<lecture->position;
277                 out<<" ";
278                 out<<lecture->Salary;
279                 out<<"\n";
280             }else if(Data[i].position=="副教授")
281             {
282                 Teacher *associateProfessor = new AssociateProfessor (Data[i].name,Data[i].position);
283                 associateProfessor->Salary =associateProfessor->CaleSalary();
284                 associateProfessor->Show();
285                 out<<associateProfessor->name;
286                 out<<" ";
287                 out<<associateProfessor->position;
288                 out<<" ";
289                 out<<associateProfessor->Salary;
290                 out<<"\n";
291                 
292             }else if(Data[i].position=="教授")
293             {
294                 Teacher *proffessor = new Proffessor (Data[i].name,Data[i].position);
295                 proffessor->Salary =proffessor->CaleSalary();
296                 proffessor->Show();
297                 out<<proffessor->name;
298                 out<<" ";
299                 out<<proffessor->position;
300                 out<<" ";
301                 out<<proffessor->Salary;
302                 out<<"\n";
303             }
304         }
305      }else printf("文件操作出错!\n"); //文件带卡失败
306     return 0;
307 }