Question

带标题......

的main.c

public class LevelScreen extends Stage implements Screen {

private Batch batch;
private Camera camera;
private Texture ballTexture;
private Sprite ball;
private Viewport viewport;
//com

private Vector3 point = new Vector3();

private World world;
private Box2DDebugRenderer box2DDebugRenderer;

private CircleShape circleShape;
private FixtureDef fixtureDef;
private BodyDef bodyDef;
private Body circleBody;

private static final float SCENE_WIDTH = 1080;
private static final float SCENE_HEIGHT = 1920f;


public LevelScreen() {
    super(new FitViewport(SCENE_WIDTH, SCENE_HEIGHT,  new OrthographicCamera(SCENE_WIDTH, SCENE_HEIGHT)));


    batch = getBatch();
    camera = getCamera();
    viewport = getViewport();

    world = new World(new Vector2(0,-9.8f), true);
    box2DDebugRenderer = new Box2DDebugRenderer();
    bodyDef = new BodyDef();
    bodyDef.type = BodyDef.BodyType.DynamicBody;
    bodyDef.position.set(600, 1000);

    ballTexture = new Texture("ball.png");
    ball = new Sprite(ballTexture);
    ball.setPosition(0,0);

    circleShape = new CircleShape();
    circleShape.setRadius(25f);

    fixtureDef = new FixtureDef();
    fixtureDef.shape = circleShape;
    fixtureDef.density = 0.5f;
    fixtureDef.friction = 0.4f;
    fixtureDef.restitution = 0.6f;

    circleBody = world.createBody(bodyDef);
    circleBody.createFixture(fixtureDef);

    box2DDebugRenderer = new Box2DDebugRenderer(
            true, /* draw bodies */
            false, /* don't draw joints */
            true, /* draw aabbs */
            true, /* draw inactive bodies */
            false, /* don't draw velocities */
            true /* draw contacts */);

    Gdx.input.setInputProcessor(this);


}

@Override
public void show() {
    System.out.println("show");
}

@Override
public void render(float delta) {
    Gdx.gl.glClearColor(1, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    batch.setProjectionMatrix(camera.combined);

    batch.begin();
    ball.draw(batch);

    batch.end();

    world.step(1 / 60f, 6, 2);
    ball.setPosition(circleBody.getPosition().x - 25f, circleBody.getPosition().y - 25f);
    box2DDebugRenderer.render(world, viewport.getCamera().combined);

}

@Override
public void resize(int width, int height) {
    viewport.update(width, height);
    System.out.println("resize");
}

@Override
public void pause() {
    System.out.println("pause");
}

@Override
public void resume() {
    System.out.println("resume");
}

@Override
public void hide() {
    System.out.println("hide");
}

@Override
public boolean touchDown(int screenX, int screenY, int pointer, int button) {
    viewport.getCamera().unproject(point.set(screenX, screenY, 0));
    return false;
}
}

sema.c

int main()
{
    double *a = NULL ,n;
    read(&a,&n);
    clock_t start,stop;
    start = clock();
    bubblesort(a,n);
    stop = clock();
    float elapsedTime = (stop - start)/CLOCKS_PER_SEC;
    printf("%f",elapsedTime);
    write(a,n);

    free(a);
    return 0;
}

sema.h

void read(int *a,int n)
{
    int i;
    scanf("%d",&n);
    a = (int*)malloc(n*sizeof(int));
    if(a == 0){printf("Error");return 0;}
    for(i = 0; i < n; ++i){
        a[i] = rand() % 100;
    }
}

void bubblesort(int *a,int n)
{
    int i,j,csere;

    for(i = 0; i < n-1; ++i){
        for(j = 0; j < n - i -1; ++j){
            if (a[j] > a[j + 1]){
                csere = a[j];
                a[j] = a[j + 1];
                a[j + 1] = csere;
            }
        }
    }
}
void write(int *a,int n)
{
    int i;
    for(i = 0; i < n; ++i){
        printf("%i ",a[i]);
    }
}

我用调试器来查找我的任何问题。我的写功能不起作用，因为它认为n为0，但我输入了。而且测量时间不起作用我得到零。我真的不明白为什么如果我输入，则n为零。

Answer 1

在main中，您将变量初始化为double，但在其他函数中，将其作为整数。在read（）中，原型是void read (int *a, int *n);
但你定义了void read(int *a, int a)和read（），为什么你在“if condition”中返回0，因为你提到了void type。

Bubblesort与测量时间

1 个答案: