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Array implementation considered, It can be extended to dynamic arrays

Code and output screen shot shared as follows





#include <iostream>
#include <cstdlib>
#define MAX_CONTACTS  100
using namespace std;

class Contact{
    string name;
    string number;

 public:
	Contact(){
		name = "Unknown";
		number = "0";
	}
	Contact(string contactName,string contactNumber){
		name= contactName;
		number = contactNumber;
	}
    string getName(){
    	return name;
    }
    string getNumber(){
    	return number;
    }
    void setName(string n){
    	name = n;
    }
    void setNumber(string n){
    	number = n;
    }
    void print(string modeOfDisplay){

      if(modeOfDisplay =="light")
         cout<<name<<" "<<number<<endl;
      else if(modeOfDisplay=="Headers")
      	 cout<<"Name: "<<name<<endl<<"Number: "<<number<<endl;
      else {
      	 cout<<"Not a valid argument to contacts print \n";
      	 exit(-1);
      }

    }
};

class AddressBook{

 //In case of extending to dynamic array, MAX_CONTACTS will be removed and a contacts pointer is used
  Contact contacts[MAX_CONTACTS];
  int noOfContacts;

  int search(string name){

     // search the position where the contact is there
     for(int i=0;i<noOfContacts;i++)
  		if(name==contacts[i].getName())
                return i;
     // not there
     return -1;

  }
  
  public:

  	AddressBook(){
  		noOfContacts = 0;
  	}

  	bool add(Contact contact){
        // check it exists or not
  		int pos = search(contact.getName());
  		if(pos==-1){
           contacts[noOfContacts] = contact;
           noOfContacts++;
           return true;
        }  // already exists
        else  return false;
  	}

    
  	bool remove(string name){
        
        // check it exists or not
  		int pos = search(name);
  		if(pos!=-1){
  		 
  		   for(int i=pos;i<noOfContacts-1;i++)
              contacts[i] = contacts[i+1];

           noOfContacts--;
           return true;
        }  // not exists
        else  return false;
          
  	}

  	void print(){

        if(noOfContacts==0) cout<<"No contacts are available"<<endl;

  		for(int i=0;i<noOfContacts;i++)
  			cout<<contacts[i].getName()<<" "<<contacts[i].getNumber()<<endl;
  	}

};


int main(){

  AddressBook addrBook1;
  string contactName, contactNumber;
  bool addStatus, removeStatus;
  Contact con;
  int choice;
  do {
    cout<<"1. Display AddressBook\n";
    cout<<"2.Add new contact\n";
    cout<<"3.Remove contact\n";
    cout<<"4.Exit\n";

    cout<<"Enter your choice: ";
    cin>>choice;

    switch(choice){
      
      case 1 :  addrBook1.print();
               break;
      case 2 :  cout<<"\nEnter name, number to add to contact";
               cin>>contactName>>contactNumber;
                con.setName(contactName);
                con.setNumber(contactNumber);
               addStatus=addrBook1.add(con);
               if(addStatus==true)
               	cout<<"\nAdded succesfully\n";
               else
               	cout<<"Add failed\n";
               break;

      case 3 :  
               cout<<"\n Enter name of the contact to remove";
               cin>>contactName;
               removeStatus = addrBook1.remove(contactName);
               if( removeStatus== true)
               	cout<<"\nremoved succesfully\n";
               else
               	cout<<"remove failed\n";
               break;
    }
  } while(choice!=4);
}

hp En 1 (2:47,76%) )) 4:48 PM venky@venky:-/chegg venky@venky:-/chegg$ ./a.out 1. Display AddressBook 2. Add new contact 3. R
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