sorting a linked list
Oct 3, 2014 at 8:59pm UTC
I have managed to create a class that handles my linked list for me.
I am allowing a user to roll dice based on the command line arguments int given at run time.
the values our printed of the rolls summed together are put into a linked list.
I am trying to figure out what I need to do to add a function to may class which will sort the linked list in descending order and then another function that will sort the list in ascending order.
So essentially I would like to add two functions to my class,
1. A function that sorts my list.
2. A function that prints my list in Ascending order.
3. A function that prints my list in descending order.
This is my main.cpp
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#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <list>
#include <vector>
#include "linklist.h"
struct score {
int d1;
int d2;
int total;
int totals[13];
} score_dice1, score_dice2, score_total, score_totals;
int dice = 2;
void Randomize() {
srand( (unsigned )time( NULL ) ) ; }
int Random(int Max) { return ( rand() % Max)+ 1; }
int main(int argc, char *argv[]) {
linklist ll;
if ( argc == 2 ) {
int dice_rolls;
dice_rolls = atoi(argv[1]);
Randomize();
for ( dice = 2; dice <= 12; dice++)
score_totals.totals[ dice ] = 0; for (dice = 0; dice < dice_rolls; dice++) {
score_dice1.d1 = Random(6) ;
score_dice2.d2 = Random(6) ;
score_total.total = score_dice1.d1 + score_dice2.d2;
score_totals.totals[ score_total.total ]++; } for (dice = 1; dice <= 13; dice++) {
ll.append(score_totals.totals[ dice ]);
ll.display(); std::cout << '\n' ;
}
} else {
std::cout << "Dont be dumb..." << '\n'
<< "How many times should we roll the dice?" << '\n'
<< "One number please" << '\n' ;
}
return 0;
}
This is my class linklist.h
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#pragma once
#ifndef LINKLIST_H
#define LINKLIST_H
#include <iostream>
class linklist
{
private :
struct node
{
int data;
node *link;
}*p;
public :
linklist();
void append( int num );
void add_as_first( int num );
void addafter( int c, int num );
void del( int num );
void display();
int count();
~linklist();
};
linklist::linklist()
{
p=NULL;
}
void linklist::append(int num)
{
node *q,*t;
if ( p == NULL )
{
p = new node;
p->data = num;
p->link = NULL;
}
else
{
q = p;
while ( q->link != NULL )
q = q->link;
t = new node;
t->data = num;
t->link = NULL;
q->link = t;
}
}
void linklist::add_as_first(int num)
{
node *q;
q = new node;
q->data = num;
q->link = p;
p = q;
}
void linklist::addafter( int c, int num)
{
node *q,*t;
int i;
for (i=0,q=p;i<c;i++)
{
q = q->link;
if ( q == NULL )
{
std::cout << "\nThere are less than " << c << " elements." ;
return ;
}
}
t = new node;
t->data = num;
t->link = q->link;
q->link = t;
}
void linklist::del( int num )
{
node *q,*r;
q = p;
if ( q->data == num )
{
p = q->link;
delete q;
return ;
}
r = q;
while ( q!=NULL )
{
if ( q->data == num )
{
r->link = q->link;
delete q;
return ;
}
r = q;
q = q->link;
}
std::cout << "\nElement " << num << " not Found." ;
}
void linklist::display()
{
node *q;
int i = 0;
std::cout << std::endl;
for ( q = p ; q != NULL ; q = q->link )
std::cout << std::endl << ++i << " " << q->data;
}
int linklist::count()
{
node *q;
int c=0;
for ( q=p ; q != NULL ; q = q->link )
c++;
return c;
}
linklist::~linklist()
{
node *q;
if ( p == NULL )
return ;
while ( p != NULL )
{
q = p->link;
delete p;
p = q;
}
}
#endif
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