Write a Menu driven Telephone Directory Program

//Telephone Directory

#include
#include
#include
#include
#include

class phoneBook{
char name[20],phno[6];
public:
void getdata();
void showdata();
char *getname(){ return name; }
char *getphno(){ return phno; }
void update(char *nm,char *telno){
strcpy(name,nm);
strcpy(phno,telno);
}
};

void phoneBook :: getdata(){
cout<<"\nEnter Name : "; cin>>name;
cout<<"Enter Phone No. : "; cin>>phno;
}

void phoneBook :: showdata(){
cout<<"\n"; cout<<<<<<"\n*****Phone Book*****\n"; cout<<"1) Add New Record\n"; cout<<"2) Display All Records\n"; cout<<"3) Search Telephone No.\n"; cout<<"4) Search Person Name\n"; cout<<"5) Update Telephone No.\n"; cout<<"6) Exit\n"; cout<<"Choose your choice : "; cin>>choice;
switch(choice){
case 1 : //New Record
rec.getdata();
cin.get(ch);
file.write((char *) &rec, sizeof(rec));
break;

case 2 : //Display All Records
file.seekg(0,ios::beg);
cout<<"\n\nRecords in Phone Book\n"; while(file){ file.read((char *) &rec, sizeof(rec)); if(!file.eof()) rec.showdata(); } file.clear(); getch(); break; case 3 : //Search Tel. no. when person name is known. cout<<"\n\nEnter Name : "; cin>>nm;
file.seekg(0,ios::beg);
found=0;
while(file.read((char *) &rec, sizeof(rec)))
{
if(strcmp(nm,rec.getname())==0)
{
found=1;
rec.showdata();
}
}
file.clear();
if(found==0)
cout<<"\n\n---Record Not found---\n"; getch(); break; case 4 : //Search name on basis of tel. no cout<<"\n\nEnter Telephone No : "; cin>>telno;
file.seekg(0,ios::beg);
found=0;
while(file.read((char *) &rec, sizeof(rec)))
{
if(strcmp(telno,rec.getphno())==0)
{
found=1;
rec.showdata();
}
}
file.clear();
if(found==0)
cout<<"\n\n---Record Not found---\n"; getch(); break; case 5 : //Update Telephone No. cout<<"\n\nEnter Name : "; cin>>nm;
file.seekg(0,ios::beg);
found=0;
int cnt=0;
while(file.read((char *) &rec, sizeof(rec)))
{
cnt++;
if(strcmp(nm,rec.getname())==0)
{
found=1;
break;
}
}
file.clear();
if(found==0)
cout<<"\n\n---Record Not found---\n"; else { int location = (cnt-1) * sizeof(rec); cin.get(ch); if(file.eof()) file.clear(); cout<<"Enter New Telephone No : "; cin>>telno;
file.seekp(location);
rec.update(nm,telno);
file.write((char *) &rec, sizeof(rec));
file.flush();
}
break;
case 6 : goto out;
}
}
out:
file.close();
}