Question

This program is used to create a phonebook for storing contact information into a text file.

The program begins by asking the user to provide a name for the file that will contain their phone book information. It will then ask the user to provide the names and numbers of their contacts. It should keep asking the user for contact information until they type in Done (case-sensitive).

After the user types Done, store all contact information into the file name they provided at the beginning of the program. If the user does not add any contacts, then the file should be empty.

Please see the sample output below to guide the design of your program.

Sample Output:

Please provide the file name for your phone book: contacts.txt

Contact 1:
Please provide the name: Elsie Simon
Please provide their number: (202)555-0115

Contact 2:
Please provide the name: Kaisha Cope
Please provide their number: 5455689016

Contact 3:
Please provide the name: Sultan Vargas
Please provide their number: 371-998-4166

Contact 4:
Please provide the name: Done

Saving phonebook into contacts.txt

Done!

in c++

Q2) This program loads contact information stored in a text file and displays it on the screen.

The program asks the user to provide the filename of a phonebook file. It will then load all of the names and numbers stored in the file and display them on the screen.

We assume that the file is stored using the correct format wherein for each contact, there is always a name followed by their phone number. Below is an example of a possible phonebook file.

Sample phonebook file (phonebook.txt):

Shanay Wickens
7205972770
Harlee Collins
3328206140
Addison Ryan
7917471622

Please see the sample output below assuming it loaded the phonebook file shown above to guide the design of your program. In case there are no contacts, inform the user that there were no contacts stored in the file. If the file does not exist, inform the user that the phonebook file is missing.

Sample Output:

Please provide the file name for your phone book: phonebook.txt

Contact 1:
Name: Shanay Wickens
Number: 7205972770

Contact 2:
Name: Harlee Collins
Number: 3328206140

Contact 3:
Name: Addison Ryan
Number: 7917471622

in c++

Answer 1

Hi,Please find the solution and rate the answer. Q2 please post seperately.

#include <iostream>
#include "string"
#include "fstream"

class Contact {
    char name[100];
    char phone[50];
public:
    const char* toString() {
        std::string s;
        s.append("");
        s.append("Name:");
        s.append(name);
        s.append("Phone");
        s.append(phone);
        s.append("\n");
        return s.c_str();
    }

    const char *getName() const {
        return name;
    }

    const char *getPhone() const {
        return phone;
    }

    void setName(char *item) {
        strcpy(Contact::name, item);
    }

    void setPhone(char *phone) {
        strcpy(Contact::phone, phone);
    }

    Contact *next;
};

Contact *head;

void add(Contact *newN) {
    newN->next = nullptr;
    if (head == nullptr) {
        head = newN;
        return;
    }
    Contact *temp = head;
    while (temp->next != nullptr) {
        temp = temp->next;
    }
    temp->next = newN;
}

char *removeEndNewLine(const char *temp) {
    int length = strlen(temp);
    char *newCh = new char[length - 1];
    strcpy(newCh, temp);
    newCh[length - 1] = '\0';
    return newCh;

}

int main() {
    char data[100];
    std::cout << "Please provide the file name for your phone book: ";
    fgets(data, 100, stdin);
    bool loop = true;
    int i = 1;
    do {
        std::cout << "Contact " << i++;
        char name[100], number[20];
        std::cout << "Please provide the name:";
        fgets(name, 100, stdin);

        if (strcmp(removeEndNewLine(name), "Done") == 0) {
            break;
        }
        Contact *temp = new Contact();
        temp->setName(removeEndNewLine(name));

        std::cout << "Please provide their number:";
        fgets(number, 20, stdin);
        if(strcmp("\n",number)==0){
            fgets(number, 20, stdin);
        }
        temp->setPhone(removeEndNewLine(number));
        add(temp);
    } while (loop);
    Contact *temp = head;

    std::ofstream str;
    str.open(removeEndNewLine(data));
    while (temp != NULL) {
        str << removeEndNewLine(temp->toString());
        str<<"\n";
        temp = temp->next;
    }
    str.close();
    return 0;
}

Sample out: See the file has stored the output.