Question

For example, I have an input text file that reads:

"Hello, how are you?"

"You look good today."

"Today is a great day."

How can I write a function that inputs each line into a node in a linked list? Thank you. (Note: the input text files could have a different amount of lines, and some lines could be blank.)

This is the linked list code:

#include <iostream>

#include <cstdlib>

#include <fstream>

class Node

{

public:

Node* next;

int data;

};

using namespace std;

class LinkedList

{

public:

int length;

Node* head;

  

LinkedList();

~LinkedList();

void add(int data);

void print();

};

LinkedList::LinkedList(){

this->length = 0;

this->head = NULL;

}

LinkedList::~LinkedList(){

std::cout << "LIST DELETED";

}

void LinkedList::add(int data){

Node* node = new Node();

node->data = data;

node->next = this->head;

this->head = node;

this->length++;

}

void LinkedList::print(){

Node* head = this->head;

int i = 1;

while(head){

std::cout << i << ": " << head->data << std::endl;

head = head->next;

i++;

}

}

int main(int argc, char const *argv[])

{

LinkedList* list = new LinkedList();

list->print();

delete list;

return 0;

}

Answer 1

#include <iostream>
#include <cstdlib>
#include <fstream>

using namespace std;
class Node {
        public:
        Node* next;
        string data;
};


class LinkedList {
        public:
        int length;
        Node* head;

        LinkedList();
        ~LinkedList();
        void add(string data);
        void print();
};

LinkedList::LinkedList(){
        this->length = 0;
        this->head = NULL;
}

LinkedList::~LinkedList(){
std::cout << "LIST DELETED";
}

void LinkedList::add(string data){
        Node* node = new Node();
        node->data = data;
        node->next = this->head;
        this->head = node;
        this->length++;
}

void LinkedList::print(){
        Node* head = this->head;
        int i = 1;
        while(head){
                std::cout << i << ": " << head->data << std::endl;
                head = head->next;
                i++;
        }
}

int main(int argc, char const *argv[]) {

        ifstream f("input.txt");
        LinkedList* list = new LinkedList();

        string line;

        while(getline(f, line)) {
                if(line != "") {
                        list->add(line);
                }
        }

        list->print();

        delete list;

        return 0;
}

input.txt:

Hello, how are you?

You look good today.

Today is a great day.

**************************************************

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