scan recusivly in to 2D array

hello!
i'm trying to write a code which get variable as int and put them at 2D array...
this a code which i wrote, it is the first time i'm trying to do thing like that.
very importent it will be Recursion and without any loops.
thanks!

Code:

---

void scanMatrix(int matrix[][18],int indexRow, int indexCol, int sizeRow, int sizeCol){

        int num;

        if(indexCol == sizeCol && indexRow == sizeRow) return;

        matrix[indexRow][indexCol]=scanf("%d",&num);

        if(indexCol != sizeCol)
                return scanMatrix(matrix,indexRow,indexCol+1,sizeRow,sizeCol);

        if(indexCol == sizeCol)
                return scanMatrix(matrix,indexRow+1,indexCol,sizeRow,sizeCol);
}

---

> matrix[indexRow][indexCol]=scanf("%d",&num);
What exactly are you expecting to happen here?

scanf is going to return -1 (aka EOF), 0 or 1.
The successful input in num is just thrown away.