Dyanmically setting the size of an array

[hoser2001]

I am given an inpute file that looks like this:

1)N - where N is an integer
2)name1
name2
.
.
nameN-1
nameN
a matrix of values of size NxN

so for example this could be a possible input file:

5
Adam
Bonnie
Clyde
Drake
Emily
0.0 23.7 49.5 9999.9 9999.9
23.7 0.0 16.9 39.4 9999.9
49.5 16.9 0.0 9999.9 53.6
9999.9 39.4 9999.9 0.0 9999.9
9999.9 9999.9 53.6 9999.9 0.0

I need to take this in as an input and be able to:
1) create two arrays of the fashion: float array[n][n] where n is the integer at the beginning
2) create an array to hold the names so something like: char array[n][20]

The problem is I don't know how to do this dynamically, how do I create arrays based on a value I don't know until i suck in the input value????

Any suggestions would be helpful.

[Lop]

Are you using ANSI C++?

For the arrays you can use the split function to create them which will make the size dynamic. Split by linebreak. Lets call this guy array1[].

Next cycle through the data using a for loop. Add array[0] to another array, lets call him dataArray[array[0]][array.Length-1]

// Using .NET code, convert to whatever - this is just for logic
for (int i=1;i<array.Length;i++) {
dataArray[array[0]][i] = array[i];
}

For the names only create another array and use a function to determine if the value of array[i] is a integer. If not, copy to the function.

[falco85]

The above code looks like it would work but I'm not sure how "valid" that would be.

Are the lengths always fixed?

[orbital_fox]

Dude, u need to use malloc.. Alocate memory, based on the name size, and then store the data there..

But remember, C/C++, will automatically create an array, with all the arguments, if i recall its argv[] .. You could just use that instead, of making your own copy

But malloc is what you need to make dynamic memory management systems..