Malloc/and structs plz help

[dezz101]

Hi all,

I'm making a struct like this

typedef struct{

	double *x;
	double *y;
}data;

Then I declare a variable of type 'data' in main.

is it alright to allocate memory to x & y (as they are array pointers) I have typed it like this.

	data twoColoumbTable;
	numRows = 100;

	twoColoumbTable.x = malloc(numRows * sizeof(double));
	twoColoumbTable.y = malloc(numRows * sizeof (double));

just wanted confirmation that this is correct thanks
Or should it be more like this

	twoColoumbTable = malloc(2 * numRows * sizeof(double));

but then i cant allocate memory to the individual members.
Am hopeing the way iv done it (first eg) it right.

appreciate the help guys

[robwhit]

http://cboard.cprogramming.com/showthread.php?t=106945