ProductsRatingManager/LinkedList.cpp at main · lillyem/ProductsRatingManager · GitHub

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#include <iostream>
#include <cstdlib>
#include <cmath>
#include "LinkedList.h"

using namespace std;


LLNode * createLLNode (string name, int rating) {

	LLNode * newLLNode;

	newLLNode = new LLNode;
	newLLNode->name = name;
	newLLNode->rating=rating;
	newLLNode->next = NULL;

	return newLLNode;
}


int sizeRatings (LLNode * top) {

	if(top==NULL){
		return 0;
	}

	return 1+ sizeRatings(top->next);
}


LLNode * insertRating (LLNode * top, string name, int rating) {

	if(top==NULL || top->rating <=rating){
		LLNode * newLLNode = createLLNode(name,rating);
		newLLNode->next=top;
		return newLLNode;
	}
	top->next=insertRating(top->next, name, rating);

	return top;
}


LLNode * deleteRating (LLNode * top, string name) {

	if(top==NULL){
		return NULL;
	}

	if(top->name==name){

		LLNode * curr = top;
		top=top->next;

		delete curr;

		return top;
	}

	top->next=deleteRating(top->next, name);

	return top;

}


void displayRatings (LLNode * top) {

	if(top==NULL){
		return;
	}

	cout << top->name << "	" << top->rating << endl;

	displayRatings(top->next);
}


LLNode * findRating (LLNode * top, string name) {

	if(top==NULL){
		return NULL;
	}

	if(top->name==name){
		return top;
	}
	return findRating(top->next,name);
}


int averageRating (LLNode * top) {

	int sum=0;
	int num=0;

	if(top==NULL){
		return 0;
	}

	while(top!=NULL){
		sum+=top->rating;
		top=top->next;
		num++;
	}

	float average=(sum*1.0)/num;

	int avg=round(average);

	return avg;
}