multi-dim arrays in c

["Stephen Adler" <user=65@nabble.blu.org>]

 Guys, 

I've got a standard c coding question which has been nagging me for a 
while and I was wondering what you guys may think or have the correct 
solution to this problem.... 

Lets say I have a 2 dim array of data and the dimension sizes can change 
depending on the specific data set. I can read in the x and y dimensions 
from a file, then read in the x*y elements of the data a populate a 
memory area x*y*elementsizeinbytes with the data. But now I want to 
access the data. Without doing pointer arithmatic, is it possible to use 
the standard [][] notation somehow? 

for example 

    int *data; 
    x=getXDim(); 
    y=getYDim(); 
    data=(int *)malloc(x*y*sizeof(int)); 
    readInData(x,y,data); 
    printf("Middle data element is %d\n",data[y][x]); 

but I know that that data[y][x] will barf on the compiler because the 
compiler has no way of knowing what the y size of the "y" dimension is... 

Any suggestions on how to use the N-dimensional bracket notation in this 
situation? 

Thanks. 


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