C++ :: Rotates A Vector 90 Degrees - Values Won't Stay Negative

I have a function that rotates a vector 90 degrees. Only problem is, i never get negative values. For some strange reason, no matter what i do, the value of x is positive. And even if the x is negative. Once i put it into direction (struct with 2 values x and y) it turns again to positive. Im using VSC++2013 ultimate. At first direction was SDL_Point, so i thought it was SDL problem, but now it seems its something else.

if (c == '-') {
int x = direction.y;
x *= -1;
int y = direction.x;
direction = { x, y };
}