Question

C++ Only Please

10.15 LAB: Warm up: Contacts

You will be building a linked list. Make sure to keep track of both the head and tail nodes.

(1) Create three files to submit.

• ContactNode.h - Class declaration
• ContactNode.cpp - Class definition
• main.cpp - main() function

(2) Build the ContactNode class per the following specifications:

• Parameterized constructor. Parameters are name followed by phone number.

• Public member functions

  • InsertAfter() (2 pts)
  • GetName() - Accessor (1 pt)
  • GetPhoneNumber - Accessor (1 pt)
  • GetNext() - Accessor (1 pt)
  • PrintContactNode()

• Private data members

  • string contactName
  • string contactPhoneNum
  • ContactNode* nextNodePtr

Ex. of PrintContactNode() output:

Name: Roxanne Hughes
Phone number: 443-555-2864

(3) In main(), prompt the user for three contacts and output the user's input. Create three ContactNodes and use the nodes to build a linked list. (2 pts)

Ex:

Person 1
Enter name:
Roxanne Hughes
Enter phone number:
443-555-2864
You entered: Roxanne Hughes, 443-555-2864

Person 2
Enter name:
Juan Alberto Jr.
Enter phone number:
410-555-9385
You entered: Juan Alberto Jr., 410-555-9385

Person 3
Enter name:
Rachel Phillips
Enter phone number:
310-555-6610
You entered: Rachel Phillips, 310-555-6610

(4) Output the linked list. (2 pts)

Ex:

CONTACT LIST
Name: Roxanne Hughes
Phone number: 443-555-2864

Name: Juan Alberto Jr.
Phone number: 410-555-9385

Name: Rachel Phillips
Phone number: 310-555-6610

I have tried the following 3 files:

main.cpp

#include "ContactNode.h"
#include<stdlib.h>
#include<stdio.h>
int main() {
// Declare variable.
char contactName[50];
char contactPhoneNum[50];
// Declare pointers.
ContactNode *head = NULL;
ContactNode *tail = NULL;
// declare number of links.
ContactNode *one;
ContactNode *two;
ContactNode *three;
printf("Person 1\n");
// prompt the user to enter name

printf("Enter name:\n");
scanf("%[^\n]%*c",contactName);

// prompt the user to enter phone number.
printf("Enter phone number:\n");
scanf("%[^\n]%*c",contactPhoneNum);
printf("You entered: %s, %s\n",contactName,contactPhoneNum);

// call the function.
one = CreateContactNode(contactName,contactPhoneNum);
printf("\nPerson 2\n");

// prompt the user to enter name
printf("Enter name:\n");
scanf("%[^\n]%*c",contactName);
printf("Enter phone number:\n");

// prompt the user to enter phone number.
scanf("%[^\n]%*c",contactPhoneNum);
printf("You entered: %s, %s\n",contactName,contactPhoneNum);

// call the function.
two = CreateContactNode(contactName,contactPhoneNum);
printf("\nPerson 3\n");

// prompt the user to enter name
printf("Enter name:\n");
scanf("%[^\n]%*c",contactName);
printf("Enter phone number:\n");

// prompt the user to enter phone number.
scanf("%[^\n]%*c",contactPhoneNum);
printf("You entered: %s, %s\n",contactName,contactPhoneNum);

// call the function.
three = CreateContactNode(contactName,contactPhoneNum);

// call the function.
InsertContactAfter(&head,&tail,one);
InsertContactAfter(&head,&tail,two);
InsertContactAfter(&head,&tail,three);

// call the function.
PrintContactNode(head);
return 0;

}

ContactNode.cpp

#include "ContactNode.h"
#include<malloc.h>
#include<stdio.h>
#include<string.h>

// definition of the function.
ContactNode* allocateMemory() {
// return value.
return (ContactNode *) malloc(sizeof(ContactNode));
}

// definition of the function.
ContactNode* CreateContactNode(char contactName[], char contactPhoneNum[]) {
// alllocate the memory.
ContactNode *newNode = allocateMemory();
// check the condition
if(newNode == NULL) {
printf("Stack Overflow error");
return NULL;
}
  
// copy the string in variable.
strcpy(newNode->contactName,contactName);
strcpy(newNode->contactPhoneNum,contactPhoneNum);
newNode->nextNodePtr = NULL;

// return newnode.
return newNode;
}

// Definition of the function.
void InsertContactAfter(ContactNode **head,ContactNode **tail,ContactNode *newNode) {
// Check the condition.
if(newNode == NULL) {
return;
}
// check the condition.
if(*head == NULL) {
// assign value.
*head = newNode;
*tail = newNode;
return;
}
// assign value.
(*tail)->nextNodePtr = newNode;
*tail = GetNextContact(*tail);
}

// definition of the function.
ContactNode * GetNextContact(ContactNode *node) {
// check the condition.
if(node == NULL) {
return NULL;
}

// return value.
return node->nextNodePtr;
}
  
// definition of the function.
void PrintContactNode(ContactNode *head) {
// check the condition.
if(head == NULL) {
printf("\nContacts are Empty.\n");
return;
}
  
// assign value.
ContactNode*current = head;
printf("\nCONTACT LIST\n");
// start the while loop
while(current) {
// display the result.
printf("Name: %s\n",current->contactName);
printf("Phone number: %s\n\n", current->contactPhoneNum);
current = GetNextContact(current);
}
}

ContactNode.h

#ifndef CONTACTNODE_H
#define CONTACTNODE_H

// Declare the structure.
typedef struct ContactNode {
// declare an character array.
char contactName[50];
char contactPhoneNum[50];
struct ContactNode *nextNodePtr;
}

ContactNode;
// Declare the functions.
ContactNode* CreateContactNode(char [], char []);
void InsertContactAfter(ContactNode **,ContactNode **,ContactNode *);
ContactNode* GetNextContact(ContactNode *);
void PrintContactNode(ContactNode *);

#endif

And am only getting 4/9 points in credit. I can't seem to figure out why. I tried to include my results but it was too long.

Thank you for the help in advance. I can't figure out what I'm doing wrong for the full credit.

Answer 1

i build link list your code has some problem in many place so i set it

main.cpp

#include "ContactNode.cpp"
#include<stdlib.h>
#include<stdio.h>
int main() {
// Declare variable.
char contactName[50];
char contactPhoneNum[50];
// Declare pointers.
ContactNode *head = NULL;
ContactNode *tail = NULL;
// declare number of links.
ContactNode *one;
ContactNode *two;
ContactNode *three;
printf("Person 1\n");
// prompt the user to enter name

printf("Enter name:\n");
scanf("%[^\n]%*c",contactName);

// prompt the user to enter phone number.
printf("Enter phone number:\n");
scanf("%[^\n]%*c",contactPhoneNum);
printf("You entered: %s, %s\n",contactName,contactPhoneNum);

// call the function.
one = CreateContactNode(contactName,contactPhoneNum);
printf("\nPerson 2\n");

// prompt the user to enter name
printf("Enter name:\n");
scanf("%[^\n]%*c",contactName);
printf("Enter phone number:\n");

// prompt the user to enter phone number.
scanf("%[^\n]%*c",contactPhoneNum);
printf("You entered: %s, %s\n",contactName,contactPhoneNum);

// call the function.
two = CreateContactNode(contactName,contactPhoneNum);
printf("\nPerson 3\n");

// prompt the user to enter name
printf("Enter name:\n");
scanf("%[^\n]%*c",contactName);
printf("Enter phone number:\n");

// prompt the user to enter phone number.
scanf("%[^\n]%*c",contactPhoneNum);
printf("You entered: %s, %s\n",contactName,contactPhoneNum);

// call the function.
three = CreateContactNode(contactName,contactPhoneNum);

// call the function.
InsertContactAfter(&head,&tail,one);
InsertContactAfter(&head,&tail,two);
InsertContactAfter(&head,&tail,three);

// call the function.
PrintContactNode(head);
return 0;

}

ContactNode.h

#ifndef CONTACTNODE_H
#define CONTACTNODE_H

// Declare the structure.
typedef struct ContactNode {
// declare an character array.
char contactName[50];
char contactPhoneNum[50];
struct ContactNode *nextNodePtr;
}

ContactNode;
// Declare the functions.
ContactNode* CreateContactNode(char [], char []);
void InsertContactAfter(ContactNode **,ContactNode **,ContactNode *);
ContactNode* GetNextContact(ContactNode *);
void PrintContactNode(ContactNode *);

#endif

ContactNode.cpp

#include "ContactNode.h"
#include<malloc.h>
#include<stdio.h>
#include<string.h>

// definition of the function.
ContactNode* allocateMemory() {
// return value.
return (ContactNode *) malloc(sizeof(ContactNode));
}

// definition of the function.
ContactNode* CreateContactNode(char contactName[], char contactPhoneNum[]) {
// alllocate the memory.
ContactNode *newNode = allocateMemory();
// check the condition
if(newNode == NULL) {
printf("Stack Overflow error");
return NULL;
}
  
// copy the string in variable.
strcpy(newNode->contactName,contactName);
strcpy(newNode->contactPhoneNum,contactPhoneNum);
newNode->nextNodePtr = NULL;

// return newnode.
return newNode;
}

// Definition of the function.
void InsertContactAfter(ContactNode **head,ContactNode **tail,ContactNode *newNode) {
// Check the condition.
if(newNode == NULL) {
return;
}
// check the condition.
if(*head == NULL) {
// assign value.
*head = newNode;
*tail = newNode;
return;
}
// assign value.
(*tail)->nextNodePtr = newNode;
*tail = GetNextContact(*tail);
}

// definition of the function.
ContactNode * GetNextContact(ContactNode *node) {
// check the condition.
if(node == NULL) {
return NULL;
}

// return value.
return node->nextNodePtr;
}
  
// definition of the function.
void PrintContactNode(ContactNode *head) {
// check the condition.
if(head == NULL) {
printf("\nContacts are Empty.\n");
return;
}
  
// assign value.
ContactNode*current = head;
printf("\nCONTACT LIST\n");
// start the while loop
while(current) {
// display the result.
printf("Name: %s\n",current->contactName);
printf("Phone number: %s\n\n", current->contactPhoneNum);
current = GetNextContact(current);
}
}

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