1 球球大作战
在计算机逐步渗入社会生活各个层面的今天，计算机已经成为人们日常生活的一分，越来越多的人使用计算机办公、娱乐等等。
球球大作战是曾经风靡一时的手机游戏，现在咱们用C语言来盘他~
2 背景知识
游戏的基本操作包括键盘按下（上下左右四个方向，还有作弊测试按键空格键和A键），玩家可以在地图上随意移动，不过不能超出边界。
不管是玩家还是AI都可以吃比自己小的球，反之也可以被吃，吃掉之后直径会增大，增大算法是被吃掉的半径的1/4。如果玩家被吃掉，会在任意地方重新开始。
球球大作战的设计原理:
球球大作战游戏分为几个步骤：
✿ 第一步，使用自定义空白图片表示地图;
✿ 第二步，绘制玩家，食物;
✿ 第三步，处理玩家移动，以及吃食物判断;
✿ 第四步，绘制ai;
✿ 第五步，ai移动。
3 上代码
先看代码，然后自己去敲代码练习哦~
如果你想深度学习基础编程和高级编程——编程俱乐部【点击进入】！
**涉及到：**C语言、C++、windows编程、网络编程、QT界面开发、Linux编程、游戏编程、黑客等等......
#include<graphics.h> //包含easyx图形库文件#include<time.h> //C语言时间头文件#include<mmsystem.h>//win32多媒体设备接口文件#pragma comment(lib,"winmm.lib")//win32多媒体设备接口库#define WIN_WIDTH 1024 //屏幕的宽#define WIN_HEIGHT 640//576 //屏幕高#define MAP_WIDTH (WIN_WIDTH*3) //地图宽度#define MAP_HEIGHT (WIN_HEIGHT*3)//地图高度#define FOOD_NUM 500 //食物数量#define AI_NUM 200 //ai数量IMAGE map(MAP_WIDTH, MAP_HEIGHT);POINT g_CameraPos; // 摄像机(屏幕左上角)在地图上的位置struct Ball{bool flag; // 是否被吃 活 1,死 0COLORREF color; // 颜色float r; //float x; // 坐标float y;int type; //食物独有属性，决定是什么类型的食物（圆？矩形？多边形？）};struct Ball mover; //玩家struct Ball food[FOOD_NUM]; //食物数组struct Ball ai[AI_NUM]; //AI数量void ChaseAlgorithom(Ball *chase, Ball *run);float DisTance(Ball b1, Ball b2);void Gameinit(){//设置随机数种子srand((unsigned)time(NULL));//播放背景音乐mciSendString("open BallGame.mp3 alias bk", 0, 0, 0);mciSendString("play bk repeat", 0, 0, 0);//初始化食物for (int i = 0; i < FOOD_NUM; i++){food[i].x = (float)(rand() % MAP_WIDTH);food[i].y = (float)(rand() % MAP_HEIGHT);food[i].r = (float)(rand() % 5 + 1);food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256); // 随机颜色food[i].flag = 1;food[i].type = rand() % 3;}//初始化AIfor (int i = 0; i < AI_NUM; i++){ai[i].color = RGB(rand() % 256, rand() % 256, rand() % 256); //rand()%256 随机取值 0-255ai[i].flag = 1;ai[i].x = rand() % (MAP_WIDTH - int(ai[i].r + 0.5)) + int(ai[i].r + 0.5); //AI产生的位置不会出现一个越界ai[i].y = rand() % (MAP_HEIGHT - int(ai[i].r + 0.5)) + int(ai[i].r + 0.5);ai[i].r = float(rand() % 10 + 10);}{//初始化玩家数据mover.color = BLUE;mover.r = 10;//玩家在窗口的位置mover.x = rand() % WIN_WIDTH;mover.y = rand() % WIN_HEIGHT;mover.flag = 1;}}//游戏地图开始绘制位置判断void computeCameraPos(){// 以人物位置为中心计算摄像机的理论位置g_CameraPos.x = mover.x - WIN_WIDTH / 2;g_CameraPos.y = mover.y - WIN_HEIGHT / 2;// 防止摄像机越界if (g_CameraPos.x < 0) g_CameraPos.x = 0;if (g_CameraPos.y < 0) g_CameraPos.y = 0;if (g_CameraPos.x > MAP_WIDTH - WIN_WIDTH) g_CameraPos.x = MAP_WIDTH - WIN_WIDTH;if (g_CameraPos.y > MAP_HEIGHT - WIN_HEIGHT) g_CameraPos.y = MAP_HEIGHT - WIN_HEIGHT;}//游戏绘制void Gamedraw(){SetWorkingImage(&map);setbkcolor(WHITE); // 白色背景cleardevice();//画食物for (int i = 0; i < FOOD_NUM; i++){if (food[i].flag == 1){setfillcolor(food[i].color);if (food[i].type == 0){solidellipse((int)food[i].x, (int)food[i].y, (int)(food[i].x + food[i].r), (int)(food[i].y + food[i].r));}else if (food[i].type == 1){solidpie((int)food[i].x, (int)food[i].y, (int)(food[i].x + food[i].r), (int)(food[i].y + food[i].r), 0.0, 1.5);}else{solidcircle(int(food[i].x), int(food[i].y), int(food[i].r));}}else{food[i].x = (float)(rand() % MAP_WIDTH);food[i].y = (float)(rand() % MAP_HEIGHT);food[i].r = (float)(rand() % 5 + 1);food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256); // 随机颜色food[i].flag = 1;food[i].type = rand() % 3;}}//画AIfor (int i = 0; i < AI_NUM; i++){if (ai[i].flag == 1){setfillcolor(ai[i].color);solidcircle(ai[i].x, ai[i].y, ai[i].r);}else{ai[i].color = RGB(rand() % 256, rand() % 256, rand() % 256); //rand()%256 随机取值 0-255ai[i].flag = 1;ai[i].x = rand() % (MAP_WIDTH - int(ai[i].r + 0.5)) + int(ai[i].r + 0.5); //AI产生的位置不会出现一个越界ai[i].y = rand() % (MAP_HEIGHT - int(ai[i].r + 0.5)) + int(ai[i].r + 0.5);ai[i].r = float(rand() % 10 + 10);}}//绘制玩家setfillcolor(RED);fillcircle(mover.x, mover.y, mover.r);//绘制玩家名称settextcolor(BLACK);setbkmode(TRANSPARENT);settextstyle(20, 0, "楷体");char pname[] = "微信公众号：C语言编程俱乐部";int twidth = textwidth(pname)/2;//计算文字宽度为了居中显示在玩家中央outtextxy(mover.x-twidth, mover.y, pname);//恢复默认工作区，即窗口SetWorkingImage();//更新摄像机位置computeCameraPos();//把地图显示到窗口上putimage(0, 0, WIN_WIDTH, WIN_HEIGHT, &map, g_CameraPos.x, g_CameraPos.y);}//玩家移动，参数为玩家移动的速度（单位像素）void Gamemove(int speed){//获取键盘按键if (GetAsyncKeyState(VK_UP) & 0x8000){if (mover.y - mover.r > 0){mover.y -= speed;}}if (GetAsyncKeyState(VK_DOWN) & 0x8000){if (mover.y + mover.r < MAP_HEIGHT){mover.y += speed;}}if (GetAsyncKeyState(VK_LEFT) & 0x8000){if (mover.x - mover.r > 0){mover.x -= speed;}}if (GetAsyncKeyState(VK_RIGHT) & 0x8000){if (mover.x + mover.r < MAP_WIDTH){mover.x += speed;}}//作弊测试，按空格不断增大,A缩小if (GetAsyncKeyState(VK_SPACE) & 0x8000){mover.r += 3;}if (GetAsyncKeyState('A') & 0x8000){if (mover.r > 1)mover.r -= 1;}}//玩家吃食物void EatFood(){for (int i = 0; i < FOOD_NUM; i++){if (food[i].flag == 1 && DisTance(food[i], mover) < mover.r){food[i].flag = 0;mover.r += food[i].r / 4;}}}//玩家吃Ai，Ai吃玩家void EatAi(){for (int i = 0; i < AI_NUM; i++){if (ai[i].flag == 0)continue;//玩家吃Aiif (DisTance(ai[i], mover) < mover.r - ai[i].r / 3){ai[i].flag = 0;mover.r += ai[i].r / 4;break;//吃到一个就退出}//ai吃玩家else if (DisTance(ai[i], mover) < ai[i].r - mover.r / 3){mover.x = rand() % MAP_WIDTH;mover.y = rand() % MAP_HEIGHT;ai[i].r += mover.r / 4;mover.r = 10;break;}}}//AI吃食物,AI吃Aivoid AiEatFood(){for (int i = 0; i < AI_NUM; i++){if (ai[i].flag == 0)continue;//ai吃食物for (int j = 0; j < FOOD_NUM; j++){if (food[j].flag == 1 && DisTance(ai[i], food[j]) < ai[i].r){food[j].flag = 0;ai[i].r += food[i].r / 4;}}//Ai吃Aifor (int k = i + 1; k < AI_NUM; k++){if (ai[k].flag == 1){if (DisTance(ai[i], ai[k]) < ai[k].r - ai[i].r / 3){ai[i].flag = 0;ai[k].r += ai[i].r / 4;}else if (DisTance(ai[i], ai[k]) < ai[i].r - ai[k].r / 3){ai[k].flag = 0;ai[i].r += ai[k].r / 4;}}}}}//Ai移动算法，追逐比自己半径小的球void AiMove(){for (int i = 0; i < AI_NUM; i++){double min_DISTANCE = MAP_WIDTH;//最大搜索距离int min = -1;//用来保存找到目标小球的下标if (ai[i].flag == 1){//AI靠近AIfor (int k = i + 1; k < AI_NUM; k++){if (ai[i].r > ai[k].r&&ai[k].flag == 1){//如果能吃，且距离达到要求则更新距离，并保存下标if (DisTance(ai[i], ai[k]) < min_DISTANCE){min_DISTANCE = DisTance(ai[i], ai[k]);min = k;}}}}//如果找到目标，则去追逐if ((min != -1)){ChaseAlgorithom(&ai[i], &ai[min]);}}}void JudeEat(){EatFood();EatAi();AiEatFood();AiMove();}int main(){initgraph(WIN_WIDTH, WIN_HEIGHT, 1);Gameinit();DWORD t1, t2;t1 = t2 = GetTickCount();while (1){Gamedraw();Gamemove(1);if (t2 - t1 > 50){JudeEat();t1 = t2;}t2 = GetTickCount();}getchar();closegraph();return 0;}//追逐算法void ChaseAlgorithom(Ball *chase, Ball *run){if (rand() % 2 == 0){if (chase->x < run->x){chase->x += 2;}else{chase->x -= 2;}}else{if (chase->y < run->y){chase->y += 2;}else{chase->y -= 2;}}}//求两点之间的距离float DisTance(Ball b1, Ball b2){return sqrt((b1.x - b2.x)*(b1.x - b2.x) + (b1.y - b2.y)*(b1.y - b2.y));}
运行效果
