C語言遊戲項目球球大作戰實現流程

struct Ball //小球結構，玩傢，食物，人工智障
{
	int x;
	int y;
	int r;//半徑
	DWORD color;//顏色
	bool flag;//是否存在 
};
int score = 0;//分數
struct Ball food[FOOD_NUM];
struct Ball player;//玩傢
struct Ball ai[AI_NUM];

void GameInit()
{
	//播放背景音樂
	mciSendString("open ./BallBGM.mp3 alias BGM", 0, 0, 0);
	//mciSendString("play BGM repeat", 0, 0, 0);
	//設置隨機數種子 時間是在不斷的變化的
	srand((unsigned)time(NULL));
	//找到每一個元素
	for (int i = 0; i < FOOD_NUM; i++)
	{
		food[i].x = rand() % WIDTH;
		food[i].y = rand() % HEIGHT;
		food[i].flag = true;//剛開始食物是存在的，沒有被吃掉
		food[i].r = rand() % 6 + 1;
		food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);
	}
	//初始化玩傢數據
	player.x = rand() % WIDTH;
	player.y = rand() % HEIGHT;
	player.r = 18;//隻要比最大的食物大就可以瞭
	player.flag = true;
	player.color= RGB(rand() % 256, rand() % 256, rand() % 256);
	//初始化ai
	for (int i = 0; i < AI_NUM; i++)
	{
		ai[i].x = rand() % WIDTH;
		ai[i].y = rand() % HEIGHT;
		ai[i].r = rand() % 10 + 5;
		ai[i].flag = true;
		ai[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);
	}
}

void GameDraw()
{
	//防止閃屏
	BeginBatchDraw();
	setbkcolor(WHITE);
	cleardevice();//清屏
	for (int i = 0; i < FOOD_NUM; i++)
	{
		if (food[i].flag)
		{
			setfillcolor(food[i].color);//設置填充顏色
			solidcircle(food[i].x, food[i].y, food[i].r);//畫一個填充圓
		}
		else
		{
			food[i].x = rand() % WIDTH;
			food[i].y = rand() % HEIGHT;
			food[i].flag = true;//剛開始食物是存在的，沒有被吃掉
			food[i].r = rand() % 6 + 1;
			food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);
		}
	}
	//繪制玩傢
	setfillcolor(player.color);//設置填充顏色
	solidcircle(player.x, player.y, player.r);
	settextcolor(GREEN);
	settextstyle(30, 0, "黑體");
	setbkmode(0);//設置文字背景透明
	outtextxy(player.x-50, player.y, "我是最亮的崽");
	//輸出分數
	settextcolor(BLACK);
	char str[20];
	sprintf(str,"分數：%d",score);//格式化字符串
	outtextxy(20, 20, str);
	//繪制ai
	for (int i = 0; i < AI_NUM; i++)
	{
		if (ai[i].flag)
		{
			setfillcolor(ai[i].color);//設置填充顏色
			solidcircle(ai[i].x, ai[i].y, ai[i].r);//畫一個填充圓
		}
	}
	EndBatchDraw();
}

void keyControl(int speed)
{
	//獲取鍵盤消息，按得是哪一個鍵  _getch();    GetAsyncKeyState() windows系統函數
	if ((GetAsyncKeyState('W') || GetAsyncKeyState(VK_UP)) && player.y >= 0)//按瞭上鍵 y不能小於0
	{
		player.y -= speed;
	}
	if ((GetAsyncKeyState('S') || GetAsyncKeyState(VK_DOWN)) && player.y <= HEIGHT)//按瞭下鍵
	{
		player.y += speed;
	}
	if ((GetAsyncKeyState('A') || GetAsyncKeyState(VK_LEFT)) && player.x >= 0)//按瞭左鍵
	{
		player.x -= speed;
	}
	if ((GetAsyncKeyState('D') || GetAsyncKeyState(VK_RIGHT)) && player.x <= WIDTH)//按瞭右鍵
	{
		player.x += speed;
	}
}

void eatFood()
{
	for (int i = 0; i < FOOD_NUM; i++)
	{
		if (food[i].flag && distance(food[i], player) <= player.r)
		{
 
			food[i].flag = false;
			player.r += food[i].r / 4;
			score++;//加分
		}
	}
}

void aiMove()
{
	for (int i = 0; i < AI_NUM; i++)
	{
		if (ai[i].flag)
		{
			ai[i].x += rand() % 5-2;// ?%5={0,1,2,3,4}-2=={-2,-1,0,1,2}
			ai[i].y += rand() % 5 - 2;//0 
		}
	}
}

int main(int argc,char *agv[])
{
	initgraph(WIDTH, HEIGHT);
	GameInit();
	while (1)
	{
		keyControl(1);
		GameDraw();
		eatFood();
		aiMove();
	}
 
	getchar();
	return 0;
}