使用C语言实现弹小球
定义基本变量和结构体
```c
struct Ball {
float x, y; // 小球当前位置
float vx, vy; // 小球速度
float gravity; // 重力加速度
float bounce; // 反弹系数
};
```
初始化小球
```c
struct Ball ball = {
.x = 0,
.y = 0,
.vx = 0,
.vy = -1, // 初始速度向下
.gravity = 0.5,
.bounce = 0.8
};
```
实现下落和弹跳函数
```c
void update(struct Ball *ball) {
ball->y += ball->vy;
ball->vy += ball->gravity;
if (ball->y >= SCREEN_HEIGHT) {
ball->y = SCREEN_HEIGHT;
ball->vy = -ball->vy * ball->bounce; // 反弹
}
}
```
绘制小球
```c
void draw(struct Ball *ball) {
fillcircle(ball->x, ball->y, 10);
}
```
主循环
```c
int main() {
initgraph(SCREEN_WIDTH, SCREEN_HEIGHT);
while (1) {
cleardevice();
update(&ball);
draw(&ball);
Sleep(10); // 控制帧率
}
closegraph();
return 0;
}
```
使用C++和Pygame实现弹小球
安装Pygame库
```bash
pip install pygame
```
初始化游戏窗口
```python
import pygame
pygame.init()
SCREEN_WIDTH, SCREEN_HEIGHT = 800, 600
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("弹球游戏")
```
定义颜色和游戏主循环
```python
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
BLUE = (0, 0, 255)
clock = pygame.time.Clock()
def main():
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
screen.fill(WHITE)
update_ball()
draw_ball()
pygame.display.flip()
clock.tick(60)
```
定义小球类
```python
class Ball:
def __init__(self):
self.x = SCREEN_WIDTH / 2
self.y = 0
self.vx = 0
self.vy = -5
self.gravity = 0.5
self.bounce = 0.8
def update(self):
self.y += self.vy
self.vy += self.gravity
if self.y >= SCREEN_HEIGHT:
self.y = SCREEN_HEIGHT
self.vy = -self.vy * self.bounce
def draw(self):
pygame.draw.circle(screen, BLUE, (int(self.x), int(self.y)), 10)
```
定义板子类
```python
class Board:
def __init__(self):
self.x = (SCREEN_WIDTH - 60) / 2
self.y = SCREEN_HEIGHT - 10
self.width = 60
self.height = 10
def draw(self):
pygame.draw.rect(screen, BLACK, (self.x, self.y, self.width, self.height))
```