Mine

void placenum(sMatrix mat, int *row, int *col, int num, int size) {
		
	//These are our "mapped" variables.
	int maprow, mapcol;

	//This is the position in the data vector;
	int datavec;

	//Initialize our loop to fill the matrix.  We're going to begin by first making the middle column of the top
	//row a one.  Then we're going to move to the right and up and increment until we're done.  If its
	//full we're going to move down and then continue moving up and right.  If we reach the edge we're going to
	//"wrap" around like an old Nintendo video game.

	if(*row<1) *row =+ size;
	if(*col<1) *col += size;

	mapcol=*col%size;
	maprow=*row%size;

	datavec=(maprow-1)*size+mapcol;

	if(mat.data[datavec]==NULL) {
		mat.data[datavec]=num;
	} else {
		*col--;	*row-=2;
		placenum(mat,col,row,num,size);
	}
}
	
sMatrix magic(int size) {

	//If size is even, return nothing.
	//if((size%2)==0) error("Matrix must be odd");

	//Initialize a new matrix to hold our results.
	sMatrix result;
	result.cols=size;
	result.rows=size;
	result.data=(double*)malloc(size*size*sizeof(double));

	//Initialize loop variable
	int loop;

	//Use these col and row variables to keep where we're at in the matrix;
	int loccol, locrow;
	loccol=(int)floor((double)(size/2))+1;
	locrow=1;
	

	for(loop=1;loop<=size;loop++) {
		
		placenum(result,&locrow,&loccol,loop,size);
		locrow--;
		loccol++;

	}

	return result;
}