Practice
---------

problem 1:

int array2D[MAX][MAX];


int Index(int r, int c, int numberOfColumns)
{
	return c + numberOfColumns * r;
}


for(int r = 0; r < MAX; r++)
{
	for(int c = 0; c < MAX; c++)
	{
		array[Index(r,c)] = r*c;

		cout << “
	}
}



problem 2:


typedef int (*ArithmeticFcn)(int, int);

ArithmeticFcn GetArithmeticFcn(char op);

int Add(int x, int y);
 
int Sub(int x, int y);
 
int Mul(int x, int y);
 
int Div(int x, int y);


int main()
{
	char ops[] = {'+', '-', '*', '/'};
	
	int x1 = 0;
	int x2 = 0;
	char op;
	
	cout << "Please input the 2 operands with a space between: ";
	cin >> x1 >> x2;

	cout << "Please input the op code: ";
	cin >> op;

	ArithmeticFcn OpFcn = GetArithmeticFcn(op);

	cout << x1 << " " << op << " " << x2 << " = " << OpFcn(x1, x2) << endl;
}

int Add(int x, int y)
{
    return x + y;
}
 
int Sub(int x, int y)
{
    return x - y;
}
 
int Mul(int x, int y)
{
    return x * y;
}
 
int Div(int x, int y)
{
    return x / y;
}

ArithmeticFcn GetArithmeticFcn(char op)
{
	switch (op)
	{
	default: // default will be to add
	case '+': return Add;
	case '-': return Sub;
	case '*': return Mul;
	case '/': return Div;
	}
}