Passing pointer to double array to function

[prkwl1]

Hi,

I'm new to C and am really confused about how C handles pointers and double arrays. For instance, I'm trying to do something like the following:

typedef int matrix[100][100];
typedef matrix *matrixpointer;

Then I allocate memory

matrixpointer p = (matrixpointer)malloc(sizeof(int) * 100 * 100);

And then try to pass it to a function, SetupMatrix:

SetupMatrix(p);

Where SetupMatrix is defined as:

void SetupMatrix(matrixpointer p) {
     matrix m = *p;
     m[0][0] = 10;
     ....
     ....
     return;
}

However this doesn't seem to work. Does any one know what's going on? Thanks!

[weaknessforcats]

All your questions are answered here:

http://bytes.com/topic/c/insights/772412-arrays-revealed