How do you sort a string within a class parameter?

My professor has asked us to make a program that will take a user's input and continue reading until the end of input. Only then, can the program output what the user has typed.

Input should be based on video title, it's url, comments made on the video, length (in minutes), and rating (in *).

For example:

United Break Guitars, https://www.youtube.com/watch?v+5YGc4zOqozo, Great example of one person getting a giant company to listen, 4.5, ***, Space Versus Tabs, https://www.youtube.com/watch?v=SsoOG6ZeyUl, Decide for yourself: spaces or tabs?, 2.83, ****

Before inputting any video description, the user needs to specify a sorting method of three choices, Rating, Length, or title. I have completed most of the code and sort method asked by my professor (bubble sort), however when I ask the program to sort by title (which is the only one of the three options that is a string), it does not output correctly. Here is my code:

#include <iostream>
#include <stdlib.h>
#include <cstring>
using namespace std;

#include "video.h"


int main()
{
    string user, url, comment, title;
    int rating;
    double length;
    int i = 0, last = 0;

    Video *videoObj[100];


   // specifies how the videos should be sorted
   cin >> user;
   cin.ignore();


while (getline(cin,title)  ) {


    getline(cin, url);
    getline(cin, comment);
    cin >> length;
    cin >> rating;
    cin.ignore();



    videoObj[i] = new Video(title, url, comment, length, rating);
    i++;
    last++;
    }

//------------------------------------------------------------------------
//--------------- Sorts the list based on rating (*) ---------------------
//------------------------------------------------------------------------

    if(user=="rating"){

        for(int i = 0; i < last - 1; i++){

    for(int j = 0; j< last - i -1; j++){

    if(videoObj[j +1]->Rating(videoObj[j])){
            swap(videoObj[j], videoObj[j+1]);

      }
    }
  }
}

//------------------------------------------------------------------------
//--------------- Sorts the list based on length -------------------------
//------------------------------------------------------------------------

    if(user=="length"){

        for(int i = 0; i < last - 1; i++){

    for(int j = 0; j< last - i -1; j++){

    if(videoObj[j +1]->Length(videoObj[j])){
            swap(videoObj[j], videoObj[j+1]);


      }
    }
  }
}

//------------------------------------------------------------------------
//--------------- Sorts the list based on title --------------------------
//------------------------------------------------------------------------

 if(user=="title"){

        for(int i = 0; i < last - 1; i++){

    for(int j = 0; j< last - i -1; j++){

    if(videoObj[j +1]->Title(videoObj[j])){
            swap(videoObj[j], videoObj[j+1]);

      }
    }
  }
}


   for(int i= 0; i < last; i++){

    videoObj[i]->print();

   }

     //delete[] videoObj;

return 0;
}

video.cpp:

#include <iostream>
#include <algorithm>
using namespace std;

#include "video.h"

Video::Video(string video_title, string video_link, string video_comment, double video_length, int video_number)
: title(video_title), link(video_link), comment(video_comment), length(video_length), rating(video_number)
{
 m_title = title;
 m_link = link;
 m_comment = comment;
 m_length = length;
 m_rating = rating;
}


bool Video::Rating(Video *other)
{
    if(m_rating > other-> m_rating){
        return true;
    }
    else
    {
        return false;
    }
}


bool Video::Length(Video *other2)
{
     if(m_length > other2-> m_length){
        return true;
    }
    else
    {
        return false;
    }
}

bool Video::Title(Video *other3)
{
     if(m_length > other3-> m_length){
        return true;
    }
    else
    {
        return false;
    }
}

void Video::print(){

string star;
switch(rating){

case 1:
    star = "*";
    break;
case 2:
    star = "**";
    break;
case 3:
    star = "***";
    break;
case 4:
    star = "****";
    break;
case 5:
    star = "*****";
    break;

}

 cout << title << ", " << link << ", " << comment << ", " << length << ", " << star << endl;

}

video.h:

#ifndef VIDEO_H
#define VIDEO_H

using namespace std;

class Video {

public:
    Video(string video_title, string video_link, string video_comment, double video_length, int video_number);
    void print();
    bool Rating(Video *other);
    bool Length(Video *other2);
    bool Title(Video *other3);




private:


    string m_title;
    string m_link;
    string m_comment;
    double m_length;
    int m_rating;

    string title;
    string link;
    string comment;
    double length;
    int rating;

};


#endif

I'm not exactly sure what I need to do to title to make it function correctly. I was thinking of comparing by strings, but again, not sure where to start.

Also, another question, how do I use delete[] videoObj;without getting an error?

Solution

Well this is wrong, just a typo probably

bool Video::Title(Video *other3)
{
     if(m_length > other3-> m_length){
        return true;
    }
    else
    {
        return false;
    }
}

It should be m_title not m_length (probably)

bool Video::Title(Video *other3)
{
     if(m_title > other3-> m_title){
        return true;
    }
    else
    {
        return false;
    }
}

Also this code can be simplified, the above can be written in one line

bool Video::Title(Video *other3)
{
    return m_title > other3-> m_title;
}

if (xxx) return true; else return false; is exactly the same as return xxx;. Beginners often don't realise you can calculate with booleans in this is way.