Question

所以在我们的大学，我们现在正在处理，我决定做一个小游戏。但是，如果我开始游戏，它会在＃34;没有响应＆＃34;之后崩溃。在学校里用c ++进行无限循环时遇到了类似的问题，但是我找不到自己犯的错误。希望有人可以帮助我:)）

/*

Project: Circle Munch

Project explanation:  The player has to collect the green circles with the moveable circle via W, A, S, D or arrow keys and avoid the red ones -- Project for "Medieninformatik" WS 2016/2017                    

Coder: Jannik Indorf

Date of last edit: 12.10.2016

Ideas of interest: diff. big circles, different points


*/


float m_x = width / 2;                       // X-coordinate starting point (center) for: player
float m_y = height / 2;                       // Y-coordinate "                                          " 
float [] o_x;                               // X-c. for : object
float [] o_y;                               // Y-c. "               "
float background_r = random(100);           //Background rgb values. 0-100 are dark, player and objects are bright 
float background_g = random(100);
float background_b = random(100);
int Score = 0;                                  // Player-Score
int m_radius = 40;                          // player radius
int o_radius= 30;                           // Object radia
color g = color(255,0,0);                    // color green
color r = color(0,255,0);                  // color red
int[] o_color = {g,r};                     // Array for color red && green → Function: color detection
int Counter_o = 1;                          // Obstacle Counter
int o_c_v = o_color.length;                  // length of Array: o_color for randomizing the outcome

void setup()                                
{
  size(640,480);
  frameRate(60*4);
  ellipseMode(CENTER);
}

void draw()
{

// ********** Background color declaration *************************  
  background(background_r,background_g,background_b);

// ***********Drawing the Player ************************
 fill(255,255,200);
  ellipse(m_x,m_y, m_radius, m_radius);                      // Moving Object

// ********** TextOut f. Score *************************  
  fill(0);
  textSize(16);
  textAlign(CENTER,CENTER);
  text(Score,m_x,m_y);

// ********** User-Input *************************  
UserInput();
//****** Staying inside the window.. ********* 
InsideWindow();

  // 
  if(Score % 10 == 0 || Score == 0)
    {
      Counter_o = Score/10 +1;

          /*for every Counter_o : draw 1 Ellipse. → for every Counter_o, make 2 new variables for every new object x and object y */


            for (int i=0; i<= Counter_o; i++)
            {

                for (int j=0; j <= i; j++ ) 
                 {
                     o_x[j] = random(15,625); 
                     o_y[j] = random(15,465);        

                    o_c_v= (int) random(1,2);
                    fill(o_color[o_c_v]);

                    ellipse(o_x[j],o_y[j], o_radius, o_radius);

                 }


            }
    }

// *********** Collision detection ************************ 

  for(int k =0 ; k< o_x.length ; k++)
  {
    if (dist(m_x , m_y, o_x[k], o_y[k] ) <= m_radius/2 + o_radius/2)
    {
      Score = color_check(o_color[k]);
      o_x[k] = random(15,625); 
      o_y[k] = random(15,465);
    }
  }

} // *************End of loop**************************************************************
/*************************************************************************


Collision detection between circles
Jannik Indorf
12.10.2016

**************************************************************************/

int color_check(int check_o_color)
{
  int Score_difference = 0;


  if (check_o_color == o_color[0]) // Green Obstacles increase the score
  {
    Score_difference =  5;

    background_r = random(100);
    background_g = random(100);
    background_b = random(100);
  }
    else                           // Red Obstacles lower the score
  {
    Score_difference = -10;
    background_r = random(100);
    background_g = random(100);
    background_b = random(100);

  }

  m_radius = m_radius + Score_difference;

return Score_difference;
}
/************************************************************************/
/*************************************************************************


User Input via W,A,S,D or ↑ ↓ → ←
Jannik Indorf
12.10.2016

**************************************************************************/

void UserInput()
{
   if (keyPressed){                                         
    if(key =='w' || key == 'W'||keyCode == UP)
    {
      m_y = m_y - 1;
    }
     if(key =='a' || key == 'A'||keyCode == LEFT)
    {
      m_x = m_x - 1;
    }
     if(key =='d' || key == 'D'||keyCode == RIGHT)
    {
      m_x = m_x + 1;
    }
     if(key =='s' || key == 'S'||keyCode == DOWN)
    {
      m_y = m_y + 1;
    }

  }
 }

/*************************************************************************
*************************************************************************

Staying Inside the Window, get out right, come out left
Jannik Indorf
12.10.2016

**************************************************************************/

 void InsideWindow()
 {
     if (m_x > width)
  {
    m_x = 0;
  }
  if (m_x < 0)
  {
    m_x = width;
  }
  if (m_y > height)
  {
    m_y = 0;
  }
  if (m_y < 0)
  {
    m_y = height;
  }


 }
 /*************************************************************************
 *************************************************************************/

Answer 1

您的代码不会进入无限循环。它在此行上点击NullPointerException：

o_x[j] = random(15, 625);

它正在点击此NullPointerException，因为您从未给过o_x一个值。你可以通过给它一个值来解决这个问题。

但是你会遇到许多其他变量的类似问题。看起来你正试图一次写下你的整个草图，这只会让你感到头痛。相反，我建议退一步，重新开始草图。每次只添加一个小东西，并在每次添加新行时测试代码！

处理：无限循环（？）

1 个答案: