Database lab

[atitaniuma]

Hello,

I am learning C++ and pointers and arrays have been hard for me to grasp on.

Last week, my teacher assigned us a lab in which we used dynamic memory to make a list of numbers which I couldnt not finish because I didnt know where to start and what to do. My teacher tried helping but it was too late. My next assignment is similar and I am trying to start on it but cant seem to know wehre to start. I have read multiple tutorials and saw multiple videos and understand pointers and array but still need help. I am not asking someone to give me the code but help me get started. Please help and thank you in advance. I am so lost :(.




Write a program that creates a database of Compact Disk (CD) information. Your database will consist of the following data elements:

string CDTitle[50];
string Artist[50];
int number_of_songs[50];

Example or forth entry in CD Database:

CDTitle[3]: "Greatest Hits"
Artist[3]: "aba"
number_of_songs[3]: 12

Create a useable user interface that allows the user to input data into each CD Entry, modify a CD entry, and print out the entire database of CDs.

Thus a menu MIGHT look like this:

1. Add CD
2. Print out CD list
3. Modify CD entry
4. Quit program

HINT: You must have some sort of variable that keeps track of the number of CDs entered. This will start out at 0 and increment by 1 each time a CD is entered.


Feel free to add extra features if you wish.
[/quote]

This is what I have so far,

#include <iostream>
#include <string>


using namespace std;
	

int main()
{
	int selection;

	int counter = 0;

	string CDTitle[50];
	string Artist[50];
	int number_of_songs[50];


	int database[1000];



	do
	{
		cout<<"Menu -------------"<<endl;
		cout<<"<1>Add CD"<<endl;
		cout<<"<2>Print Out CD List"<<endl;
		cout<<"<3>Modify CD Entry"<<endl;
		cout<<"<4>Quit"<<endl;

		cin>>selection;
		cout<<endl<<endl;
		
		if(selection == 1)
		{

			
			cout<<"Enter CD Title";
			getline(cin, CDTitle);

			cout<<"Enter Artist";
			getline(cin, CDTitle);

			cout<<"Enter number of songs.";
			cin>>number_of_songs[counter];


			counter++;
		}


		else if(selection == 2)
		{
			for(int i = 0; i<=50; i++)
				cout<<CDTitle[i];



		}


		else if(selection == 3)
		{

		}


		else if(selection == 4)
		{
			return 0;
		}


	}while(selection != 4);





}

[mobat]

You have the getline function incorrect. Its cin.getline(variable, size)

[atitaniuma]

Figured it out.

Dynamically memory is hard concept but easy once you get it. I still hate pointers.

[ascii]

actually getline is:

cin.getline(where to store, size, character to stop once entered);

example

char array[50];
cin.getline(array, 50, '\n');

generally you want to use \n as the ending character because it represents the newline so when they press enter it will terminate the input

[Athar]

His use of getline was fine and the only appropriate one in this case.

Dynamically memory is hard concept but easy once you get it. I still hate pointers.

There's no direct use of dynamic memory or pointers in your program (not that there should be).

And you have an out-of-bounds access here:
for(int i = 0; i<=50; i++)
The indexes of your array go from 0 to 49 - not 50.