# include & ltfstream.h & gt
# include & ltiomanip.h & gt
Static int n = 0；;
int comp(char*，char *)；
Class students
{
Public:
void getdata()
{
tag = ' #
Cout & lt& lt "(name, ID number, class score):";
CIN & gt； & gt name & gt& gt number & gt& gtClass & gt& gt score;
}
char gettag()
{
Return label;
}
Invalid display ()
{
if(tag=='# ')
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt name & lt setw (18) < & lt number & lt setw (20) < & ltClass & lt& ltsetw(20)& lt； & lt score & lt& ltendl
}
char *getname()
{
Returns the name;
}
Private:
Char tag;
Character name [12];
Character number [18];
Char class [20];
char score[6]；
};
class?teacher/head?teacher
{
Public:
void getdata()
{
tag = ' #
Cout & lt& lt "(name, ID number, professional title college):";
CIN & gt； & gt name & gt& gtNo.>& gt Chen Zhi>& gt Xueyuan;
}
char gettag()
{
Return label;
}
Invalid display ()
{
if(tag=='# ')
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt name & lt setw (18) < & lt number & lt setw (20) < < Chen Zhi < < setw (20) <; & lt snowfield & lt& ltendl
}
char *getname()
{
Returns the name;
}
Private:
Char tag;
Character name [12];
Character number [18];
Charles Chen Zhi [20];
Cha Xueyuan [30];
};
Class students and teachers
{
Public:
void getdata()
{
tag = ' #
Cout & lt& lt "(name, ID number, class score, professional title institution):";
CIN & gt； & gt name & gt& gt number & gt& gtClass & gt& gt score & gt& gt Chen Zhi>& gt Xueyuan;
}
char gettag()
{
Return label;
}
Invalid display ()
{
if(tag=='# ')
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt name & lt setw (18) < & lt number & lt setw (20) < & ltClass & lt& ltsetw(20)& lt； < lt score < lt setw (20) < < Chen Zhi < < setw (20) <; & lt snowfield & lt& ltendl
}
char *getname()
{
Returns the name;
}
Private:
Char tag;
Character name [12];
Character number [18];
Char class [20];
Double integral;
Charles Chen Zhi [20];
Cha Xueyuan [30];
};
void func 1()
{
Ofstream output ("myfrd.dat");
Student s;
Cout & lt& lt "input data"
Cout & lt& lt "Number of students:";
CIN & gt； & gtn；
for(int I = 0； I & ltn；; i++)
{
Cout & lt& lt "first"
s . get data()；
output . write((char *)& amp； s，sizeof(s))；
};
output . close()；
}
void func2()
{
ifstream input(" my frd . dat ")；
Student s;
Cout & lt& lt "output data"
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt "Name"
input . read((char *)& amp； s，sizeof(s))；
While (input)
{
s . disp()；
input . read((char *)& amp； s，sizeof(s))；
};
input . close()；
}
void func3()
{
char sname[ 10]；
Ifstream file ("myfrd.dat");
Student one;
file . seekg(0)；
Cout & lt& lt "Enter the name to query (only last name can be entered):";
CIN & gt； & gtsname
Cout & lt& lt "Output query results:"
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt "Name"
file . read((char *)& amp； First, sizeof(one))；);
While (file)
{
if(comp(one.getname()，sname)== 1)
one . disp()；
file . read((char *)& amp； First, sizeof(one))；);
};
file . close()；
}
void func4()
{
fstream outapp("MyFrd.dat "，IOs::app)；
Student one;
Cout < < "Add data:";
one . get data()；
out app . write((char *)& amp； First, sizeof(one))；);
out app . close()；
}
void func5()
{
char sname[ 12]；
int I = 0；
fstream outdel("MyFrd.dat "，IOs::in | IOs::out)；
Student one;
outdel . seekg(0)；
Cout & lt& lt "Enter the name to be deleted (only last name can be entered):";
CIN & gt； & gtsname
And (! outdel.eof())
{
outdel . seekp(sizeof(student)* I)；
outdel . read((char *)& amp； First, sizeof(one))；);
if(comp(one.getname()，sname)= = 1 & amp； & ampone.gettag()=='# ')
{
outdel . seekp(sizeof(student)* I)；
outdel . put(' * ')；
}
i++；
}
outdel . close()；
}
void func6()
{
fstream outdel("student.dat "，IOs::in)；
fstream temp("temp "，IOs::out | IOs::trunc)；
Student s;
And (! outdel.eof())
{
outdel . read((char *)& amp； S, sizeof (student));
if(s.gettag()=='# ')
temp . write((char *)& amp； S, sizeof (student));
}
outdel . close()；
temp . close()；
fstream outdel 1(" my frd . dat "，IOs::out | IOs::trunc)；
fstream temp 1("temp "，IOs::in)；
And (! temp 1.eof())
{
temp 1 . read((char *)& amp； S, sizeof (student));
outdel 1 . write((char *)& amp； S, sizeof (student));
}
outdel 1 . close()；
temp 1 . close()；
Cout & lt& lt "This record has been physically deleted"
}
void func7()
{
Ofstream output ("myfrd1.dat");
Teacher's;
Cout & lt& lt "input data"
Cout & lt& lt "Number of teachers:";
CIN & gt； & gtn；
for(int I = 0； I & ltn；; i++)
{
Cout & lt& lt "first"
s . get data()；
output . write((char *)& amp； s，sizeof(s))；
};
output . close()；
}
void func8()
{
Ifstream input ("myfrd1.dat");
Teacher's;
Cout & lt& lt "output data"
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt "Name"
input . read((char *)& amp； s，sizeof(s))；
While (input)
{
s . disp()；
input . read((char *)& amp； s，sizeof(s))；
};
input . close()；
}
void func9()
{
char sname[ 10]；
Ifstream file ("myfrd1.dat");
Teacher one;
file . seekg(0)；
Cout & lt& lt "Enter the name to query (only last name can be entered):";
CIN & gt； & gtsname
Cout & lt& lt "Output query results:"
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt "Name"
file . read((char *)& amp； First, sizeof(one))；);
While (file)
{
if(comp(one.getname()，sname)== 1)
one . disp()；
file . read((char *)& amp； First, sizeof(one))；);
};
file . close()；
}
void func0()
{
fstream out app(" my frd . dat 1 "，IOs::app)；
Teacher one;
Cout < < "Add data:";
one . get data()；
out app . write((char *)& amp； First, sizeof(one))；);
out app . close()；
}
void func0 1()
{
char sname[ 12]；
int I = 0；
fstream outdel(" myfrd 1 . dat "，IOs::in | IOs::out)；
Teacher one;
outdel . seekg(0)；
Cout & lt& lt "Enter the name to be deleted (only last name can be entered):";
CIN & gt； & gtsname
And (! outdel.eof())
{
outdel . seekp(sizeof(teacher)* I)；
outdel . read((char *)& amp； First, sizeof(one))；);
if(comp(one.getname()，sname)= = 1 & amp； & ampone.gettag()=='# ')
{
outdel . seekp(sizeof(teacher)* I)；
outdel . put(' * ')；
}
i++；
}
outdel . close()；
}
void func02()
{
fstream outdel("teacher.dat "，IOs::in)；
fstream temp("temp "，IOs::out | IOs::trunc)；
Teacher's;
And (! outdel.eof())
{
outdel . read((char *)& amp； S, sizeof (teacher));
if(s.gettag()=='# ')
temp . write((char *)& amp； S, sizeof (teacher));
}
outdel . close()；
temp . close()；
fstream outdel 1(" myfrd 1 . dat "，IOs::out | IOs::trunc)；
fstream temp 1("temp "，IOs::in)；
And (! temp 1.eof())
{
temp 1 . read((char *)& amp； S, sizeof (teacher));
outdel 1 . write((char *)& amp； S, sizeof (teacher));
}
outdel 1 . close()；
temp 1 . close()；
Cout & lt& lt "This record has been physically deleted"
}
void func03()
{
Ofstream output ("myfrd2.dat");
Student teacher's;
Cout & lt& lt "input data"
Cout & lt& lt "Number of students:";
CIN & gt； & gtn；
for(int I = 0； I & ltn；; i++)
{
Cout & lt& lt "first"
s . get data()；
output . write((char *)& amp； s，sizeof(s))；
};
output . close()；
}
void func04()
{
ifstream input(" my frd 2 . dat ")；
Student teacher's;
Cout & lt& lt "output data"
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt "Name"
input . read((char *)& amp； s，sizeof(s))；
While (input)
{
s . disp()；
input . read((char *)& amp； s，sizeof(s))；
};
input . close()；
}
void func05()
{
char sname[ 10]；
Ifstream file ("myfrd2.dat");
Student teacher one;
file . seekg(0)；
Cout & lt& lt "Enter the name to query (only last name can be entered):";
CIN & gt； & gtsname
Cout & lt& lt "Output query results:"
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt "Name"
file . read((char *)& amp； First, sizeof(one))；);
While (file)
{
if(comp(one.getname()，sname)== 1)
one . disp()；
file . read((char *)& amp； First, sizeof(one))；);
};
file . close()；
}
void func06()
{
fstream outapp("MyFrd2.dat "，IOs::app)；
Student teacher one;
Cout < < "Add data:";
one . get data()；
out app . write((char *)& amp； First, sizeof(one))；);
out app . close()；
}
void func07()
{
char sname[ 12]；
int I = 0；
fstream outdel("MyFrd2.dat "，IOs::in | IOs::out)；
Student teacher one;
outdel . seekg(0)；
Cout & lt& lt "Enter the name to be deleted (only last name can be entered):";
CIN & gt； & gtsname
And (! outdel.eof())
{
outdel . seekp(sizeof(student teacher)* I)；
outdel . read((char *)& amp； First, sizeof(one))；);
if(comp(one.getname()，sname)= = 1 & amp； & ampone.gettag()=='# ')
{
outdel . seekp(sizeof(student teacher)* I)；
outdel . put(' * ')；
}
i++；
}
outdel . close()；
}
void func08()
{
fstream outdel(" student teacher . dat "，IOs::in)；
fstream temp("temp "，IOs::out | IOs::trunc)；
Student teacher's;
And (! outdel.eof())
{
outdel . read((char *)& amp； s，sizeof(student teacher))；
if(s.gettag()=='# ')
temp . write((char *)& amp； s，sizeof(student teacher))；
}
outdel . close()；
temp . close()；
fstream outdel 1(" my frd 2 . dat "，IOs::out | IOs::trunc)；
fstream temp 1("temp "，IOs::in)；
And (! temp 1.eof())
{
temp 1 . read((char *)& amp； s，sizeof(student teacher))；
outdel 1 . write((char *)& amp； s，sizeof(student teacher))；
}
outdel 1 . close()；
temp 1 . close()；
Cout & lt& lt "This record has been physically deleted"
}
void func09()
{
char sname[ 10]；
Ifstream file ("myfrd.dat");
Student one;
file . seekg(0)；
Cout & lt& lt "Enter the name to be modified (only last name can be entered):";
CIN & gt； & gtsname
Cout & lt& lt "Output query results:"
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt "Name"
file . read((char *)& amp； First, sizeof(one))；);
While (file)
{
if(comp(one.getname()，sname)== 1)
one . disp()；
file . read((char *)& amp； First, sizeof(one))；);
};
file . close()；
Ofstream output ("myfrd.dat");
Student s;
Cout & lt& lt "Re-enter data:"
s . get data()；
output . write((char *)& amp； s，sizeof(s))；
output . close()；
}
void func 10()
{
char sname[ 10]；
Ifstream file ("myfrd1.dat");
Teacher one;
file . seekg(0)；
Cout & lt& lt "Enter the name to be modified (only last name can be entered):";
CIN & gt； & gtsname
Cout & lt& lt "Output query results:"
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt "Name"
file . read((char *)& amp； First, sizeof(one))；);
While (file)
{
if(comp(one.getname()，sname)== 1)
one . disp()；
file . read((char *)& amp； First, sizeof(one))；);
};
file . close()；
Ofstream output ("myfrd1.dat");
Teacher's;
Cout & lt& lt "Re-enter data:"
s . get data()；
output . write((char *)& amp； s，sizeof(s))；
output . close()；
}
void func 1 1()
{
char sname[ 10]；
Ifstream file ("myfrd2.dat");
Student teacher one;
file . seekg(0)；
Cout & lt& lt "Enter the name to be modified (only last name can be entered):";
CIN & gt； & gtsname
Cout & lt& lt "Output query results:"
cout & lt& ltsetiosflags(ios::left)
& lt& ltsetw( 10)& lt； & lt "Name"
file . read((char *)& amp； First, sizeof(one))；);
While (file)
{
if(comp(one.getname()，sname)== 1)
one . disp()；
file . read((char *)& amp； First, sizeof(one))；);
};
file . close()；
Ofstream output ("myfrd2.dat");
Student teacher's;
Cout & lt& lt "Re-enter data:"
s . get data()；
output . write((char *)& amp； s，sizeof(s))；
output . close()；
}
int comp(char s 1[]，char s2[])
{
int I = 0；
while(s 1[i]！ = ' \ 0 ' & amp& amps2[i]！ = ' \ 0 ' & amp& amps 1[i]==s2[i])
i++；
if(s 1[I]= = ' \ 0 ' | | S2[I]= = ' \ 0 ')
Returns1;
other
Returns 0;
}
void main()
{
int sel
do
{
Cout & lt& lt "Please enter (1: Input Data 2: Output Data 3: Query by Name".
CIN & gt； & gtsel
Switch (selection)
{
Case 1:
char a，b；
while( 1)
{
Cout & lt& lt "Please enter the object of your choice (student (1), teacher (2), graduate student (3)):;
CIN & gt； & gta；
if(a==' 1 ')
func 1()；
else if(a=='2 ')
func 7()；
else if(a=='3 ')
func 03()；
other
Cout & lt& lt "Input error!" & lt& ltendl
Cout & lt& lt "Continue? (Yes/No) ";
CIN & gt； & gtb；
And (b! = ' y ' & amp& ampb！ = ' Y ' & amp& ampb！ = ' n ' & amp& ampb！ ='N ')
{
Cout & lt& lt "Sorry, you have the wrong number! Please re-enter: ";
CIN & gt； & gtb；
}
if(b=='n'||b=='N ')
Break;
}
Break;
Case 2:
char c，d；
while( 1)
{
Cout & lt& lt "Please enter the object of your choice (student (1), teacher (2), graduate student (3)):;
CIN & gt； & gtc；
if(c==' 1 ')
func 2()；
else if(c=='2 ')
func 8()；
else if(c=='3 ')
func 04()；
other
Cout & lt& lt "Input error!" & lt& ltendl
Cout & lt& lt "Continue? (Yes/No) ";
CIN & gt； & gtd；
And (d! = ' y ' & amp& ampd！ = ' Y ' & amp& ampd！ = ' n ' & amp& ampd！ ='N ')
{
Cout & lt& lt "Sorry, you have the wrong number! Please re-enter: ";
CIN & gt； & gtd；
}
if(d=='n'||d=='N ')
Break;
}
Break;
Case 3:
char e，f；
while( 1)
{
Cout & lt& lt "Please enter the object of your choice (student (1), teacher (2), graduate student (3)):;
CIN & gt； & gte；
if(e==' 1 ')
func 3()；
else if(e=='2 ')
func 9()；
else if(e=='3 ')
func 04()；
other
Cout & lt& lt "Input error!" & lt& ltendl
Cout & lt& lt "Continue? (Yes/No) ";
CIN & gt； & gtf；
And (b! = ' y ' & amp& ampb！ = ' Y ' & amp& ampb！ = ' n ' & amp& ampb！ ='N ')
{
Cout & lt& lt "Sorry, you have the wrong number! Please re-enter: ";
CIN & gt； & gtf；
}
if(f=='n'||f=='N ')
Break;
}
Break;
Case 4:
char g，h；
while( 1)
{
Cout & lt& lt "Please enter the object of your choice (student (1), teacher (2), graduate student (3)):;
CIN & gt； & gtg；
if(g==' 1 ')
func 4()；
else if(g=='2 ')
func 0()；
else if(g=='3 ')
func 06()；
other
Cout & lt& lt "Input error!" & lt& ltendl
Cout & lt& lt "Continue? (Yes/No) ";
CIN & gt； & gth；
And (h! = ' y ' & amp& amph！ = ' Y ' & amp& amph！ = ' n ' & amp& amph！ ='N ')
{
Cout & lt& lt "Sorry, you have the wrong number! Please re-enter: ";
CIN & gt； & gth；
}
if(h=='n'||h=='N ')
Break;
}
Break;
Case 5:
char m，n；
while( 1)
{
Cout & lt& lt "Please enter the object of your choice (student (1), teacher (2), graduate student (3)):;
CIN & gt； & gtm；
if(m==' 1 ')
func 5()；
else if(m=='2 ')
func 0 1()；
else if(m=='3 ')
func 07()；
other
Cout & lt& lt "Input error!" & lt& ltendl
Cout & lt& lt "Continue? (Yes/No) ";
CIN & gt； & gtn；
And (n! = ' y ' & amp& ampn！ = ' Y ' & amp& ampn！ = ' n ' & amp& ampn！ ='N ')
{
Cout & lt& lt "Sorry, you have the wrong number! Please re-enter: ";
CIN & gt； & gtn；
}
if(n=='n'||n=='N ')
Break;
}
Break;
Case 6:
char x，z；
while( 1)
{
Cout & lt& lt "Please enter the object of your choice (student (1), teacher (2), graduate student (3)):;
CIN & gt； & gtx；
if(x==' 1 ')
func 6()；
else if(x=='2 ')
func 02()；
else if(x=='3 ')
func 08()；
other
Cout & lt& lt "Input error!" & lt& ltendl
Cout & lt& lt "Continue? (Yes/No) ";
CIN & gt； & gtz；
And (z! = ' y ' & amp& ampz！ = ' Y ' & amp& ampz！ = ' n ' & amp& ampz！ ='N ')
{
Cout & lt& lt "Sorry, you have the wrong number! Please re-enter: ";
CIN & gt； & gtz；
}
if(z=='n'||z=='N ')
Break;
}
Break;
Case 7:
char s，t；
while( 1)
{
Cout & lt& lt "Please enter the object of your choice (student (1), teacher (2), graduate student (3)):;
CIN & gt； & gts；
if(s==' 1 ')
func 09()；
else if(s=='2 ')
func 10()；
else if(s=='3 ')
func 1 1()；
other
Cout & lt& lt "Input error!" & lt& ltendl
Cout & lt& lt "Continue? (Yes/No) ";
CIN & gt； & gtt；
while(t！ = ' y ' & amp& ampt！ = ' Y ' & amp& ampt！ = ' n ' & amp& ampt！ ='N ')
{
Cout & lt& lt "Sorry, you have the wrong number! Please re-enter: ";
CIN & gt； & gtt；
}
if(t=='n'||t=='N ')
Break;
}
Break;
Default value:
Cout & lt& lt "Input error!" & lt& ltendl
Break;
}
}
while(sel & gt； = 1。 & ampsel & lt=6);
}