Storing multiple arrays based on user input

[xkara]

I'm trying to create a function where it allows the user to type in multiple amounts of integers, so if the user wanted to have 3 different storages that hold different integers, the input would look something like this:

    5 
    97 12 31 2 1 //let's say this is held in variable "a"
    1 3 284 3 8  // "b"
    2 3 482 3 4 // "c"
    2 3 4 2 3  // "d"
    99 0 2 3 42 // "e" 

Since we don't know what number the user will input every time, I'm not sure how to create a dynamically allocated array that will create an x amount of arrays every time.. I want to be able to access each index of a, b, c, d, e or however many arrays there are.

So far, this is what I have, but I'm having trouble creating the arrays since it's unpredictable. I'm purposely not using vectors because I don't really get how pointers work so I'm trying to play around with it.

    int* x;
    int length, numbers;
    cin >> length;
    x = new int[length]
  
    for (int i=0;i<length;i++)
    {
        cin >> numbers; //this doesn't work because it only grabs the first line for some     reason
        x[i] = numbers
    }

If anything seems unclear, please let me know! Thank you!

[giblit]

You are trying to put an array into an int. You are going to need an array of arrays.

You could do something like:

int **x; //You should probably invest in a better name :P
int lines;
int numbers;

std::cout << "How many lines of numbers? ";
std::cin >> lines;

x = new int *[lines];

for( int i = 0; i < lines; ++i )
{
    std::cout << "How many numbers is this line? ";
    std::cin >> numbers;
    x[i] = new int[numbers];
    std::cout << "Please enter the numbers separated by spaces: ";
    for( int j = 0; j < numbers; ++j )
    {
         std::cin >> x[i][j];
    }
}

//
for( int i = 0; i < numbers lines; ++i )
    delete[] x[i];

delete[] x;

I would highly suggest you use a STL container such as a vector though.

*fixed error mentioned by SGH

[xkara]

Hm i tried this but it's not giving me the right output.

If i have

3
1 2 9
5 4 3

and i do
a[1][0] it gives me the value of 9 instead of 5? i'm not sure why.

[giblit]

Can you show the exact code you used?

http://ideone.com/4a8PuL