Easier Way To Do a Linked List?

This is a discussion on Easier Way To Do a Linked List? within the C++ Programming forums, part of the General Programming Boards category; This is how my teacher explained to use how to do a linked list. Code: #include <iostream> #include <cstdlib> #include ...

  1. #1
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    Easier Way To Do a Linked List?

    This is how my teacher explained to use how to do a linked list.

    Code:
    #include <iostream>                        
    #include <cstdlib>                         
    #include <math.h>
    #include <fstream>
    #include <string>
    
    using namespace std;
    
    struct Node{
        string parts;
        int ID;    
        int date;
        float price;
    
        Node *next;  
        
        Node(); 
    };
    
    Node::Node(){
    next=NULL; }
    
    void Insert(Node *&Front,Node *&Rear, string n_parts, int date, int n_Id, float n_price, int count){
        Node *n_Info = new Node();   // dynamically allocation a node
      
        n_Info->parts = n_parts;    // enter info onto this node's data fields
        n_Info->date = date;
        n_Info->price = n_price; 
        n_Info->ID = n_Id;
    
        if(count ==0){        
            Front = Rear = n_Info;
        }
    
        else if(count > 0){
            Rear->next = n_Info;     
            // Rear = n_Info;       // this statement acts the same as next line 
            Rear = Rear -> next;
        }
    }
    
    void Flush(Node *&Front,Node *&Rear, int L_size){
        Node *temp_node = Front;
    
        for(int i =0; i<L_size; i++){
            Front = Front->next;
            delete temp_node;
            temp_node=Front;
        }
    
    }
    
    int main(){
        
        Node *Front = NULL;
        Node *Rear = NULL;                          
        int L_size = 0;                         
        
        ifstream in("a7.txt");
            
        char temp[100];
        string temp_parts;
        int temp_ID;
        int temp_date;
        float temp_price;
    
        while(in.peek() != EOF){
            in.getline(temp, 100);
            temp_parts = temp;
    
            in.getline(temp, 100);
            temp_ID = atoi(temp);
            
            in.getline(temp, 100);
            temp_date = atoi(temp);      
            
            in.getline(temp, 100);
            temp_price = atof(temp);
    
            in.getline(temp, 100);
    
            Insert(Front, Rear, temp_parts, temp_date, temp_ID, temp_price, L_size);
             
            L_size++;
        }
       
        cout << "Total number of entries: " << L_size << endl;
        
        Flush(Front, Rear, L_size); 
    
                       
        return 0;                    
    }
    I was wondering if there was an easier way than this that does the same thing? Also how do I access things in the linked list?
    Last edited by Sherina; 11-28-2009 at 08:40 PM.

  2. #2
    int x = *((int *) NULL); Cactus_Hugger's Avatar
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    If you're learning about the internals of a linked list, and the concept of a linked list, probably not.

    If you're writing normal code, then you should be using std::list
    long time; /* know C? */
    Unprecedented performance: Nothing ever ran this slow before.
    Any sufficiently advanced bug is indistinguishable from a feature.
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