int actCollision( SDL_Rect offender, SDL_Rect defender, int offenderType, int defenderType )
{

    //if the one moving into the space is a zombie
    if ( offender.y == defender.y && offender.x == defender.x && offenderType == 3 && defenderType == 2 )
    {
        defenderType = 3;// the one occupying the space is now a zombie
        return (defenderType);
    }
    // if player
    else if ( offender.y == defender.y && offender.x == defender.x && offenderType == 3 && defenderType == 1 ) 
    {
        stop(); // game over
    }

}

int checkCollision()
{
    int compare1 = 1;
    int compare2 = 1;
    
    while( compare1 < 49 )
    {
        if( compare2 == 49 )
        {
            compare1 ++;
        }
        else
        {
        if( compare1 != compare2 )
        {
            actCollision( object[compare1], object[compare2], type[compare1], type[compare2] );
            compare2 ++;
        }
        else
        {
            compare2 ++;
        }
        }
    }

}