I need help creating a teacher classroom phone book program

I need help creating a teacher classroom phone book program for c++ and I am confused where to start. The sample output menu should look like: \'a\' --- Add person \'d\' --- Delete person \'p\' --- Print \'q\' --- Quit \'r\' --- Reset (which should reread the data file) \'s\' --- Sort and \'w\' ---- Write (which should overwrite the data file).

Also we must have a setw of around 50 and set length of around 5 for the \'a\' command

output of \'a\' should look like:

Adding person...

enter first name: Joe

enter last name: Smith

enter classroom (please no spaces): SB108

enter classroom phone extension (4 characters): 123

the \'d\' command should ask something like :

Please enter a first name, last name, class room or extension

Delete Joe Smith ( Y or N) Y

1 record deleted

The \'p\' command should:

print out this:

First Name Last Name Classroom Extension

====================================================

Joe Smith SB108 8888

the spacing inbetween needs to be like 12 characters, then 16, then 12 then 12

the \'q\' command:

should just quit the program

the \'r\' command:

should reread the data file and say something like:

Phone book reset. Size is: 9

if there is an error in the \'r\' command please state so

The \'s\' command:

creates a submenu that will sort via first name, last name , classroom and extension

Looks like:

Please choose one of:

f Sort by first name

l Sort by last name

e Sort by extension

c Sort by classroom

Sorting complete.

Solution

The name of the class is “contact”. There are two data members – name and mob

class contact
{
string name;
string mob;
  
public:
contact(): name(\"\"), mob(\"\")
{}
bool show();
bool show(string search_term);
bool name_exists(string tname);
bool add(string new_name, string new_mob);
bool edit(string);
bool erase(string new_name);
};

0. Show contacts.
1. Add contact.
2. Edit contact.
3. Delete contact.
4. print contact.
5. sort contact
6. write contact.
7.exit
cout << \"0. Show contacts\" << endl
<< \"1. Add Contact\" << endl
<< \"2. Edit Contact\" << endl
<< \"3. Delete Contact\" << endl
<< \"4. Print\" << endl
<< \"5. Sort\" << endl
<<\"6. Write\"<<end1
<<\"7. Exit\"<<end1<<end1
<< \"Your choice...\";
cin >> choice;

The following code shows all the contacts from the contacts-list. Examine the below code to understand how it works.
//This block of code resides inside the main function
cout << \"Showing Contacts\" << endl;
printline(\'-\', 50);
  
for(i=0; i<100; i++)
if(person[i].show())
flag = 1;
  
if(!flag)
cout << \"No contacts found!\" << endl;

//This block of code resides inside the class
bool show()
{
if(name != \"\")
{
cout << name << \"\\t\" << mob << endl;
return 1; //Indicates success
}
else
return 0; //Indicates failure
}

The following code adds a new contact to the contacts-list of the Phonebook application.
//The following code resides in the main function.
cout << \"Add New Contact\\t\\t\\t\\tpress $ to cancel\" << endl;
printline(\'-\', 20);
counter = 0;
  
//Loop until correct name and mobile number are entered
do
{
flag = 0;
if(counter)
cout << \"Try again\\t\\t\\t\\tpress $ to cancel\"
                       << endl;
                      
//counts how many times the do-while loop executes
                   counter++;
  
cout << \"Name: \"; cin >> temp_name;
  
//Cancel operation
if(temp_name==\"$\")
{
cancel_flag = 1;
break;
}
cout << \"Mobile No.: \"; cin >> temp_mob;
  
//Cancel operation
if(temp_mob==\"$\")
{
cancel_flag = 1;
break;
}
  
//Check whether name exists
for(i=0; i<100; i++)
if(person[i].name_exists(temp_name))
{
cout << \"The name you entered is already there\"
                           \"in the phonebook, enter a different name.\"
                           << endl;
flag = 1;
break;
}
  
}while(!name_valid(temp_name) ||
                               flag ||
                       !mob_valid(temp_mob));
  
if(cancel_flag)
{
system(\"cls\");
break;
}
  
  
//This code adds the contact to phonebook
for(i=0; i<100; i++)
if(person[i].add(temp_name, temp_mob))
{
cout << \"Contact added successfully!\" << endl;
flag = 1;
break;
}
  
if(!flag)
cout << \"Memory full! Delete some contacts first.\"
                   << endl;

//The following code resides in the class
bool add(string new_name, string new_mob)
{
if(name==\"\")
{
name = new_name;
mob = new_mob;
return 1; // Success
}
else
return 0; // Failure
  
}
The following code edits an existing contact. It edits both – name and mobile number.
//The following code resides in the main function
cout << \"Enter a contact name to edit:\"
               \"\\t\\t\\t\\tpress $ to cancel\ \";
               cin >> temp_name;
  
//Cancel Operation
if(temp_name==\"$\")
{
system(\"cls\");
break;
}
  
for(i=0; i<100; i++)
if(person[i].edit(temp_name))
{
cout << \"Edited Successfully!\" << endl;
flag = 1;
break;
}
  
if(!flag)
cout << \"Contact name not found!\" << endl;
  

//The following code resides in the class
bool contact :: edit(string new_name)
{
string new_mob;
if(new_name==name)
{
cout << \"Enter new name: \"; cin >> new_name;
cout << \"Enter new mobile no: \"; cin >> new_mob;
  
name = new_name;
mob = new_mob;
return 1;
}
else
return 0;
}
The following code removes a contact from the contacts-list in the Phonebook application.
// The following code resides in the main function.
do
{
if(counter)
cout << \"Try again\" << endl;
counter++;
cout << \"Enter a contact name to delete:\"
                   \"\\t\\t\\tpress $ to cancel\ \";
                   cin >> temp_name;
  
//Cancel Operation
if(temp_name==\"$\")
{
system(\"cls\");
break;
}
  
  
//Final Confirmation
for(i=0; i<100; i++)
if(person[i].name_exists(temp_name))
{
flag = 1;
cout << \"Are you sure you want to delete? (1/0)\"
                       << endl;
int yes;
cin >> yes;
if(!yes)
{
system(\"cls\");
cancel_flag = 1;
}
break;
}
  
if(!flag)
cout << \"Contact name not found!\" << endl;
  
if(cancel_flag)
break;
  
// This code deletes the contact
if(flag)
{
for(i=0; i<100; i++)
if(person[i].erase(temp_name))
{
cout << \"Deleted successfully!\" << endl;
break;
}
}
  
}while(!flag);

// The following code resides in the class
bool erase(string new_name)
{
if(new_name==name)
{   
name = \"\";
mob = \"\";
return 1;
}
else
return 0;
}
he following code searches for a contact.
// The following code resides in the main function.
do
{
if(counter)
cout << \"Try again\" << endl;
counter++;
cout << \"Search a name: \\t\\t\\t\\tpress $ to cancel\ \";
                   cin >> temp_name;
  
//Cancel Operation
if(temp_name==\"$\")
{
system(\"cls\");
break;
}
  
for(i=0; i<100; i++)
if(person[i].show(temp_name))
{
flag = 1;
break;
}
  
if(!flag)
cout << \"Contact name not found\" << endl;
}while(!flag);

// The following code resides in the class
bool show(string search_term)
{
if(search_term == name)
{
cout << name << \"\\t\" << mob << endl;
return 1;
}
else
return 0;
}
The printline() function prints a line. You can specify the size and the character for drawing the line.
void printline(char ch, int size)
{
for(int i=0; i<size; i++)
cout << ch;
cout << \"\ \";
}

Two functions have been used for validations. One is name_valid(), another is mob_valid. The first one checks whether the name is valid, while the second function checks whether the mobile number is valid.
Code:

bool name_valid(string tname)
{
if(tname.size()>50)
{
cout << \"Invalid Name!\ Enter a name within 20 characters!\"
       << endl;
return 0;
}
else if(tname == \"\")
{
cout << \"Invalid Name!\ Name cannot be blank!\" << endl;
return 0;
}
else
return 1;
}

//mobile number validation
bool mob_valid(string tmob)
{
if(tmob.size()>13 || tmob.size()<10)
{
cout << \"Invalid mobile no.\ Enter a no.\"
       \"between 10 and 13 digits\" << endl;
return 0;
}
else if(tmob == \"\")
{
cout << \"Invalid mobile no.\ Mobile\"
       \"no cannot be blank\" << endl;
return 0;
}
else
return 1;
}