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C语言游戏实战（9）：球球大作战

news 2025/7/5 2:08:37

前言：

这款简易版的球球大作战是一款单人游戏，玩家需要控制一个小球在地图上移动，吞噬其他小球来增大自己的体积。本游戏使用C语言和easyx图形库编写，旨在帮助初学者了解游戏开发的基本概念和技巧。

在开始编写代码之前，我们需要先了解一下游戏的基本规则和功能：

游戏界面：游戏界面是一个矩形区域，玩家可以在这个区域内控制球的移动。

玩家小球：玩家控制的小球可以在游戏界面内自由移动，按下空格键可以加速。

其他小球：其他小球又分为食物小球，和ai控制的小球

体积：玩家每吃一个其他小球体积就会增大一点，ai小球也可以通过吃食物和玩家小球增大体积。

玩家被吃：当玩家小球被ai小球吃了，玩家小球就会回到初始点，体积也会变成初始大小。

ai小球的追击和逃跑：当玩家小球与ai小球靠近时，ai小球会根据自身体积的大小选择追击玩家小球或者逃跑。

接下来，我们将通过以下几个步骤来实现这个游戏：

初始化游戏界面和小球的信息。

处理键盘输入，实现玩家小球的移动和加速。

生成足够数量的食物小球。

生成ai小球，并控制其移动。

检测小球之间的吞噬关系，增加相应的体积。

通过学习这个游戏的开发过程，初学者将能够掌握C语言编程和easyx图形库的基本技巧。

1. 小球的要素

在此游戏中一个小球的要素无非就是小球所在的位置（坐标）、小球的半径、以及小球的颜色，这里我们可以用一个结构体数组来存放这些要素，以方便初始化小球的信息。

struct Ball
{int x;int y;float r;DWORD color;
};

2. 初始化小球的信息

将玩家小球的初始位置设置在窗口的中间，半径大小为10。食物小球和ai小球的位置则通过rand函数、srand函数和time函数生成的随机数，随机分布在地图的各个位置，食物小球半径为1-5，ai小球的半径10.其中在这里使用了RGB随机生成一个颜色，使每个食物小球的颜色都不尽相同。

RGB色彩模式是一种工业标准，它通过红（R）、绿（G）、蓝（B）三个颜色通道的组合来表示不同的颜色。每个通道通常分配一个0到255之间的数值，其中0表示该颜色通道没有亮度，255表示该颜色通道的最大亮度。通过调整这三个通道的值，可以生成几乎所有人类视觉系统能够感知的颜色。例如：

橙色可以通过RGB值（255, 128, 0）来表示。
黄色的RGB值为（255, 255, 0）。
绿色的RGB值是（0, 255, 0）。
蓝色的RGB值为（0, 0, 255）。
紫色可以通过RGB值（170, 0, 255）来表示。
黑色的RGB值为（0, 0, 0）。
白色的RGB值为（255, 255, 255）。
灰色的RGB值可以是（128, 128, 128），其中三个值相等即可，值越接近255，颜色就越接近白色，反之亦然。

void Inset()
{//玩家小球srand((unsigned)time(NULL));player.x = Wide / 2;player.y = Hight / 2;player.r = 10;//食物小球for (int i = 0; i < Food_num; i++){Food[i].x = rand() % Wide_map;Food[i].y = rand() % Hight_map;Food[i].r = rand() % 5 + 1;Food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}//ai小球for (int i = 0; i < Enemy_num; i++){Enemy[i].x = rand() % Wide_map;Enemy[i].y = rand() % Hight_map;Enemy[i].r = 10;Enemy[i].color = RGB(0,255,0);}}

3. 玩家操作小球

在这里需要用到GetAsyncKeyState(vk virtual key)函数获取异步按键状态,其中vk virtual key是虚拟键值，如果接受到这个虚拟键值，它会返回真。VK_UP、VK_DOWN、VK_LEFT、VK_RIGHT、0x20分别是上箭头键、下箭头键、左箭头键、右箭头键、空格键的虚拟键值。

void Player_move()
{if (GetAsyncKeyState(VK_UP)){if (player.y > 0){player.y -= player_sleep;}}if (GetAsyncKeyState(VK_DOWN)){if (player.y < Hight_map)player.y += player_sleep;}if (GetAsyncKeyState(VK_LEFT)){if (player.x > 0)player.x -= player_sleep;}if (GetAsyncKeyState(VK_RIGHT)){if (player.x < Wide_map)player.x += player_sleep;}if (GetAsyncKeyState(0x20)){player_sleep = l + 5;}else{player_sleep = l;}
}

4. 显示出小球

在此游戏中，小球是一个实心圆，在easyx图形库中提供了一个画实心圆的函数—solidcircle函数，通过它我们就可以在窗口中显示小球了，但显示出的小球默认颜色为白色，为了区分不同的小球，我们还需使用setfillcolor函数来改变小球的颜色。因为显示的函数、玩家操作小球的函数等函数都是放在同一个while循环重复执行的，这样就会重复显示小球，所以我们还需要用到一个清屏函数cleardevice。为了使窗口更好看可以使用setbkcolor函数修改窗口的背景颜色，以及使用line函数在窗口中画一些线，函数setlinecolor可以改变线的颜色。

void Show()
{//设置地图SetWorkingImage(&map);//清屏cleardevice();//背景颜色setbkcolor(WHITE);//划线颜色setlinecolor(RGB(230,231,239));//划线for (int i = 0; i < Wide_map; i += 10){line(i, 0, i, Hight_map);}for (int i = 0; i < Hight_map; i += 10){line(0, i, Wide_map, i);}//食物for (int i = 0; i < Food_num; i++){setfillcolor(Food[i].color);solidcircle(Food[i].x, Food[i].y, Food[i].r);}//敌人for (int i = 0; i < Enemy_num; i++){setfillcolor(Enemy[i].color);solidcircle(Enemy[i].x, Enemy[i].y, Enemy[i].r);}//玩家setfillcolor(RED);solidcircle(player.x, player.y, player.r);SetWorkingImage();int x = player.x - (Wide / 2);int y = player.y - (Hight / 2);//防止窗口越界if (x < 0){x = 0;}if (y < 0){y = 0;}if (x > Wide_map - Wide){x = Wide_map - Wide;}if (y > Hight_map - Hight){y = Hight_map - Hight;}//把map输出到窗口上putimage(0, 0, Wide, Hight, &map, x, y);
}

5. 生成地图

可以使用IMAGE map(Wide_map, Hight_map) 创建一个图像映射，其中 Wide_map 代表图像的宽度，而 Hight_map 代表图像的高度。然后使用SetWorkingImage(&map)，将map的地址作为参数传递给SetWorkingImage函数。这个函数的作用是将map作为当前操作的对象，以便在后续的图像处理过程中使用。最后使用putimage(0, 0, Wide, Hight, &map, x, y) 将地址绘制到窗口上，其中要让玩家小球始终出现在窗口的中央位置，那么其中的x=player.x - (Wide / 2);y=player.y - (Hight / 2);但是单单这样写就会出现窗口越界的情况，所以我们还需要限制x和y的范围：

//防止窗口越界
if (x < 0)
{x = 0;
}
if (y < 0)
{y = 0;
}
if (x > Wide_map - Wide)
{x = Wide_map - Wide;
}
if (y > Hight_map - Hight)
{y = Hight_map - Hight;
}

putimage(0, 0, Wide, Hight, &map, x, y) 这个函数调用是用于在屏幕上的特定位置绘制或显示一个图像。下面是对这个函数调用中各个参数的具体解释：

(0, 0)：这是图像要绘制的目标位置的左上角坐标，即x=0和y=0，通常表示屏幕的左上角。

Wide：这个参数指定了要绘制的图像的宽度。

Hight：这个参数指定了要绘制的图像的高度。

&map：这是一个指向图像内存地址的指针，该图像将被绘制到屏幕上。在这个上下文中，map可能是一个包含了图像数据的数据结构或数组。

x：这个参数通常指定了要开始绘制图像的起始点的x坐标（在图像数据中）。

y：这个参数通常指定了要开始绘制图像的起始点的y坐标（在图像数据中）。

6. ai小球的移动

随机生成0-3的数字分别代表ai小球上下左右的移动，这样小球就会自由移动了。当玩家小球与ai小球靠近时，ai小球会追击或者逃跑，这里我们需要先计算小球的之间的距离，小球之间的距离就是两小球的圆心坐标的x相减的平方加上y相减的平方再开根号。开根号的函数为sqrt，它的头文件是<math.h>。

//距离
int Distance(int x, int y, int x1, int y1)
{return sqrt((x - x1) * (x - x1) + (y - y1) * (y - y1));
}

然后判断两小球的距离是否小于50个像素点，即判断是否小于玩家小球的半径 + ai小球的半径 + 50。判断完后比较两小球的半径大小，如果ai小球的半径大于玩家小球的半径，那么ai小球就要追击玩家小球，即ai小球的坐标需要靠近玩家小球的坐标，就是如果ai小球的x大于玩家小球的x那么ai小球的x就减小，同理可得剩下的操作。

void Enemy_move()
{srand((unsigned)time(NULL));for (int i = 0; i < Enemy_num; i++){int direction = rand() % 4;if (Distance(player.x, player.y, Enemy[i].x, Enemy[i].y) > player.r + Enemy[i].r + 50){if (direction == 0){if (Enemy[i].y > 0)//防止小球越界的判断语句{Enemy[i].y -= enemy_sleep;}}if (direction == 1){if (Enemy[i].y < Hight_map)Enemy[i].y += enemy_sleep;}if (direction == 2){if (Enemy[i].x > 0)Enemy[i].x -= enemy_sleep;}if (direction == 3){if (Enemy[i].x < Wide_map)Enemy[i].x += enemy_sleep;}}//敌人追击玩家if (Distance(player.x, player.y, Enemy[i].x, Enemy[i].y) < player.r + Enemy[i].r + 50){if (Enemy[i].r > player.r){if (Enemy[i].x < player.x){if (Enemy[i].x < Wide_map){Enemy[i].x += enemy_sleep;}}if (Enemy[i].x > player.x){if (Enemy[i].x > 0){Enemy[i].x -= enemy_sleep;}}if (Enemy[i].y < player.y){if (Enemy[i].y < Hight_map){Enemy[i].y += enemy_sleep;}}if (Enemy[i].y > player.y){if (Enemy[i].y > 0){Enemy[i].y -= enemy_sleep;}}}//敌人逃跑else{if (Enemy[i].x < player.x){if (Enemy[i].x > 0){Enemy[i].x -= enemy_sleep;}}if (Enemy[i].x > player.x){if (Enemy[i].x < Wide_map){Enemy[i].x += enemy_sleep;}}if (Enemy[i].y < player.y){if (Enemy[i].y > 0){Enemy[i].y -= enemy_sleep;}}if (Enemy[i].y > player.y){if (Enemy[i].y < Hight_map){Enemy[i].y += enemy_sleep;}}}}}
}

7. 小球之间的吞噬关系

玩家小球与ai小球、ai小球与ai小球：

当两小球的圆心小于最大的那个圆的半径时，小的那个球就会被吃掉。吃点就是那个小球重新找个位置生成。吃完后，吃的那个小球半径增加被吃小球半径的十分之一。

ai小球与食物小球、玩家小球与食物小球：同上。

void EatFood()
{for (int i = 0; i < Food_num; i++){//玩家吃食物if (Distance(player.x, player.y, Food[i].x, Food[i].y) < player.r){player.r += Food[i].r / 100;Food[i].x = rand() % Wide_map;Food[i].y = rand() % Hight_map;Food[i].r = rand() % 5 + 1;Food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}}for (int j = 0; j < Enemy_num; j++){//敌人吃食物for (int i = 0; i < Food_num; i++){if (Distance(Enemy[j].x, Enemy[j].y, Food[i].x, Food[i].y) < Enemy[j].r){Enemy[j].r += Food[i].r / 50;Food[i].x = rand() % Wide_map;Food[i].y = rand() % Hight_map;Food[i].r = rand() % 5 + 1;Food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}}//敌人吃敌人for (int i = 0; i < Enemy_num; i++){if (Distance(Enemy[j].x, Enemy[j].y, Enemy[i].x, Enemy[i].y) < Enemy[j].r&& Enemy[j].r > Enemy[i].r){Enemy[j].r += Enemy[i].r / 10;Enemy[i].x = rand() % Wide_map;Enemy[i].y = rand() % Hight_map;Enemy[i].r = 10;Enemy[i].color = RGB(0, 255, 0);}if (Distance(Enemy[j].x, Enemy[j].y, Enemy[i].x, Enemy[i].y) < Enemy[i].r && Enemy[j].r < Enemy[i].r){Enemy[i].r += Enemy[j].r / 10;Enemy[j].x = rand() % Wide_map;Enemy[j].y = rand() % Hight_map;Enemy[j].r = 10;Enemy[j].color = RGB(0, 255, 0);}}if (Distance(player.x, player.y, Enemy[j].x, Enemy[j].y) < player.r){//玩家吃敌人if (player.r > Enemy[j].r){player.r += Enemy[j].r / 10;Enemy[j].x = rand() % Wide_map;Enemy[j].y = rand() % Hight_map;Enemy[j].r = 10;Enemy[j].color = RGB(0, 255, 0);}//敌人吃玩家else{if (invincibility == 0){Enemy[j].r += player.r / 10;player.x = Wide / 2;player.y = Hight / 2;player.r = 10;invincibility = 10;}}}}
}

最终效果：

球球大作战

源码：

#include<stdio.h>
#include<easyx.h>
#include<time.h>
#include<math.h>
#define Wide 1024
#define Hight 640
#define Wide_map (Wide*5)
#define Hight_map (Hight*5)
#define Food_num 1888
#define Enemy_num 888
//整个游戏地图
IMAGE map(Wide_map, Hight_map);
//复活时的无敌时间
int invincibility = 10; 
//玩家速度
int player_sleep = 5;
int l = 5;
int enemy_sleep = 5;
struct Ball
{int x;int y;float r;DWORD color;
};
struct Ball player;
struct Ball Food[Food_num];
struct Ball Enemy[Enemy_num];
//初始化球的数据
void Inset()
{srand((unsigned)time(NULL));player.x = Wide / 2;player.y = Hight / 2;player.r = 10;for (int i = 0; i < Food_num; i++){Food[i].x = rand() % Wide_map;Food[i].y = rand() % Hight_map;Food[i].r = rand() % 5 + 1;Food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}for (int i = 0; i < Enemy_num; i++){Enemy[i].x = rand() % Wide_map;Enemy[i].y = rand() % Hight_map;Enemy[i].r = 10;Enemy[i].color = RGB(0,255,0);}}
//玩家操作
void Player_move()
{if (GetAsyncKeyState(VK_UP)){if (player.y > 0){player.y -= player_sleep;}}if (GetAsyncKeyState(VK_DOWN)){if (player.y < Hight_map)player.y += player_sleep;}if (GetAsyncKeyState(VK_LEFT)){if (player.x > 0)player.x -= player_sleep;}if (GetAsyncKeyState(VK_RIGHT)){if (player.x < Wide_map)player.x += player_sleep;}if (GetAsyncKeyState(0x20)){player_sleep = l + 5;}else{player_sleep = l;}
}
//距离
int Distance(int x, int y, int x1, int y1)
{return sqrt((x - x1) * (x - x1) + (y - y1) * (y - y1));
}
//敌人移动
void Enemy_move()
{srand((unsigned)time(NULL));for (int i = 0; i < Enemy_num; i++){int direction = rand() % 400;if (Distance(player.x, player.y, Enemy[i].x, Enemy[i].y) > player.r + Enemy[i].r + 50){if (direction < 100){if (Enemy[i].y > 0){Enemy[i].y -= enemy_sleep;}}if (direction < 200 && direction >= 100){if (Enemy[i].y < Hight_map)Enemy[i].y += enemy_sleep;}if (direction < 300 && direction >= 200){if (Enemy[i].x > 0)Enemy[i].x -= enemy_sleep;}if (direction <400 && direction >= 300){if (Enemy[i].x < Wide_map)Enemy[i].x += enemy_sleep;}}//敌人追击玩家if (Distance(player.x, player.y, Enemy[i].x, Enemy[i].y) < player.r + Enemy[i].r + 50){if (Enemy[i].r > player.r){if (Enemy[i].x < player.x){if (Enemy[i].x < Wide_map){Enemy[i].x += enemy_sleep;}}if (Enemy[i].x > player.x){if (Enemy[i].x > 0){Enemy[i].x -= enemy_sleep;}}if (Enemy[i].y < player.y){if (Enemy[i].y < Hight_map){Enemy[i].y += enemy_sleep;}}if (Enemy[i].y > player.y){if (Enemy[i].y > 0){Enemy[i].y -= enemy_sleep;}}}//敌人逃跑else{if (Enemy[i].x < player.x){if (Enemy[i].x > 0){Enemy[i].x -= enemy_sleep;}}if (Enemy[i].x > player.x){if (Enemy[i].x < Wide_map){Enemy[i].x += enemy_sleep;}}if (Enemy[i].y < player.y){if (Enemy[i].y > 0){Enemy[i].y -= enemy_sleep;}}if (Enemy[i].y > player.y){if (Enemy[i].y < Hight_map){Enemy[i].y += enemy_sleep;}}}}//for (int j = 0; j < Enemy_num; j++)//{//	if (Distance(Enemy[j].x, Enemy[j].y, Enemy[i].x, Enemy[i].y) < Enemy[j].r + Enemy[i].r + 30)//	{//		//敌人追敌人//		if (Enemy[i].r > Enemy[j].r)//		{//			int sleep = rand() % 6;//			int enemy_sleep1;//			if (sleep > 2)//			{//				enemy_sleep1 = enemy_sleep;//			}//			else//			{//				enemy_sleep1 = enemy_sleep + 5;//			}//			if (Enemy[i].x < Enemy[j].x)//			{//				if (Enemy[i].x < Wide_map)//				{//					Enemy[i].x += enemy_sleep1;//				}//			}//			if (Enemy[i].x > Enemy[j].x)//			{//				if (Enemy[i].x > 0)//				{//					Enemy[i].x -= enemy_sleep1;//				}//			}//			if (Enemy[i].y < Enemy[j].y)//			{//				if (Enemy[i].y < Hight_map)//				{//					Enemy[i].y += enemy_sleep1;//				}//			}//			if (Enemy[i].y > Enemy[j].y)//			{//				if (Enemy[i].y > 0)//				{//					Enemy[i].y -= enemy_sleep1;//				}//			}//		}//		//逃跑//		else//		{//			int sleep = rand() % 6;//			int enemy_sleep1;//			if (sleep > 2)//			{//				enemy_sleep1 = enemy_sleep;//			}//			else//			{//				enemy_sleep1 = enemy_sleep + 5;//			}//			if (Enemy[i].x < Enemy[j].x)//			{//				if (Enemy[i].x > 0)//				{//					Enemy[i].x -= enemy_sleep1;//				}//			}//			if (Enemy[i].x > Enemy[j].x)//			{//				if (Enemy[i].x < Wide_map)//				{//					Enemy[i].x += enemy_sleep1;//				}//			}//			if (Enemy[i].y < Enemy[j].y)//			{//				if (Enemy[i].y > 0)//				{//					Enemy[i].y -= enemy_sleep1;//				}//			}//			if (Enemy[i].y > Enemy[j].y)//			{//				if (Enemy[i].y < Hight_map)//				{//					Enemy[i].y += enemy_sleep1;//				}//			}//		}//	}//}}
}//吃食物
void EatFood()
{for (int i = 0; i < Food_num; i++){//玩家吃食物if (Distance(player.x, player.y, Food[i].x, Food[i].y) < player.r){player.r += Food[i].r / 100;Food[i].x = rand() % Wide_map;Food[i].y = rand() % Hight_map;Food[i].r = rand() % 5 + 1;Food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}}for (int j = 0; j < Enemy_num; j++){//敌人吃食物for (int i = 0; i < Food_num; i++){if (Distance(Enemy[j].x, Enemy[j].y, Food[i].x, Food[i].y) < Enemy[j].r){Enemy[j].r += Food[i].r / 50;Food[i].x = rand() % Wide_map;Food[i].y = rand() % Hight_map;Food[i].r = rand() % 5 + 1;Food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}}//敌人吃敌人for (int i = 0; i < Enemy_num; i++){if (Distance(Enemy[j].x, Enemy[j].y, Enemy[i].x, Enemy[i].y) < Enemy[j].r&& Enemy[j].r > Enemy[i].r){Enemy[j].r += Enemy[i].r / 10;Enemy[i].x = rand() % Wide_map;Enemy[i].y = rand() % Hight_map;Enemy[i].r = 10;Enemy[i].color = RGB(0, 255, 0);}if (Distance(Enemy[j].x, Enemy[j].y, Enemy[i].x, Enemy[i].y) < Enemy[i].r && Enemy[j].r < Enemy[i].r){Enemy[i].r += Enemy[j].r / 10;Enemy[j].x = rand() % Wide_map;Enemy[j].y = rand() % Hight_map;Enemy[j].r = 10;Enemy[j].color = RGB(0, 255, 0);}}if (Distance(player.x, player.y, Enemy[j].x, Enemy[j].y) < player.r){//玩家吃敌人if (player.r > Enemy[j].r){player.r += Enemy[j].r / 10;Enemy[j].x = rand() % Wide_map;Enemy[j].y = rand() % Hight_map;Enemy[j].r = 10;Enemy[j].color = RGB(0, 255, 0);}//敌人吃玩家else{if (invincibility == 0){Enemy[j].r += player.r / 10;player.x = Wide / 2;player.y = Hight / 2;player.r = 10;invincibility = 10;}}}}
}
//显示
void Show()
{//设置地图SetWorkingImage(&map);//清屏cleardevice();//背景颜色setbkcolor(WHITE);//划线颜色setlinecolor(RGB(230,231,239));//划线for (int i = 0; i < Wide_map; i += 10){line(i, 0, i, Hight_map);}for (int i = 0; i < Hight_map; i += 10){line(0, i, Wide_map, i);}//食物for (int i = 0; i < Food_num; i++){setfillcolor(Food[i].color);solidcircle(Food[i].x, Food[i].y, Food[i].r);}//敌人for (int i = 0; i < Enemy_num; i++){setfillcolor(Enemy[i].color);solidcircle(Enemy[i].x, Enemy[i].y, Enemy[i].r);}//玩家setfillcolor(RED);solidcircle(player.x, player.y, player.r);SetWorkingImage();int x = player.x - (Wide / 2);int y = player.y - (Hight / 2);//防止窗口越界if (x < 0){x = 0;}if (y < 0){y = 0;}if (x > Wide_map - Wide){x = Wide_map - Wide;}if (y > Hight_map - Hight){y = Hight_map - Hight;}//把map输出到窗口上putimage(0, 0, Wide, Hight, &map, x, y);
}
int main()
{initgraph(Wide, Hight);Inset();//缓冲BeginBatchDraw();while (1){if (invincibility > 0)invincibility--;Show();//玩家操作Player_move();Enemy_move();EatFood();//刷新FlushBatchDraw();}closegraph();return 0;
}

//修改版
#include<stdio.h>
#include<easyx.h>
#include<time.h>
#include<math.h>
#define Wide 1139
#define Hight 640
#define Wide_map (Wide*5)
#define Hight_map (Hight*5)
#define Food_num 2888
#define Enemy_num 388
#define Invincibility 50
//整个游戏地图
IMAGE map(Wide_map, Hight_map);
//复活时的无敌时间
int invincibility = Invincibility;
//玩家速度
int player_sleep = 2;
int l = 2;
int enemy_sleep = 2;
struct Ball
{int x;int y;float r;DWORD color;
};
struct Ball player;
struct Ball Food[Food_num];
struct Ball Enemy[Enemy_num];
//初始化球的数据
void Inset()
{srand((unsigned)time(NULL));player.x = Wide / 2;player.y = Hight / 2;player.r = 15;for (int i = 0; i < Food_num; i++){Food[i].x = rand() % Wide_map;Food[i].y = rand() % Hight_map;Food[i].r = rand() % 5 + 1;Food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}for (int i = 0; i < Enemy_num; i++){Enemy[i].x = rand() % Wide_map;Enemy[i].y = rand() % Hight_map;Enemy[i].r = rand() % 15 + 15;Enemy[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}}
//玩家操作
void Player_move()
{if (GetAsyncKeyState(VK_UP)|| GetAsyncKeyState(0x57)){if (player.y > 0){player.y -= player_sleep;}}if (GetAsyncKeyState(VK_DOWN)||GetAsyncKeyState(83)){if (player.y < Hight_map)player.y += player_sleep;}if (GetAsyncKeyState(VK_LEFT)|| GetAsyncKeyState(65)){if (player.x > 0)player.x -= player_sleep;}if (GetAsyncKeyState(VK_RIGHT)|| GetAsyncKeyState(68)){if (player.x < Wide_map)player.x += player_sleep;}if (GetAsyncKeyState(0x20)){player_sleep = l + 2;}else{player_sleep = l;}
}
//距离
int Distance(int x, int y, int x1, int y1)
{return sqrt((x - x1) * (x - x1) + (y - y1) * (y - y1));
}
//敌人移动
void Enemy_move()
{srand((unsigned)time(NULL));for (int i = 0; i < Enemy_num; i++){int direction = rand() % 400;if (Distance(player.x, player.y, Enemy[i].x, Enemy[i].y) > player.r + Enemy[i].r + 50){if (direction < 100){if (Enemy[i].y > 0){Enemy[i].y -= enemy_sleep;}}if (direction < 200 && direction >= 100){if (Enemy[i].y < Hight_map)Enemy[i].y += enemy_sleep;}if (direction < 300 && direction >= 200){if (Enemy[i].x > 0)Enemy[i].x -= enemy_sleep;}if (direction <400 && direction >= 300){if (Enemy[i].x < Wide_map)Enemy[i].x += enemy_sleep;}}//敌人追击玩家if (Distance(player.x, player.y, Enemy[i].x, Enemy[i].y) <= player.r + Enemy[i].r + 50){if (Enemy[i].r > player.r){if (Enemy[i].x < player.x){if (Enemy[i].x < Wide_map){Enemy[i].x += enemy_sleep;}}if (Enemy[i].x > player.x){if (Enemy[i].x > 0){Enemy[i].x -= enemy_sleep;}}if (Enemy[i].y < player.y){if (Enemy[i].y < Hight_map){Enemy[i].y += enemy_sleep;}}if (Enemy[i].y > player.y){if (Enemy[i].y > 0){Enemy[i].y -= enemy_sleep;}}}//敌人逃跑else{if (Enemy[i].x < player.x){if (Enemy[i].x > 0){Enemy[i].x -= enemy_sleep;}}if (Enemy[i].x > player.x){if (Enemy[i].x < Wide_map){Enemy[i].x += enemy_sleep;}}if (Enemy[i].y < player.y){if (Enemy[i].y > 0){Enemy[i].y -= enemy_sleep;}}if (Enemy[i].y > player.y){if (Enemy[i].y < Hight_map){Enemy[i].y += enemy_sleep;}}}}}
}//吃食物
void EatFood()
{for (int i = 0; i < Food_num; i++){//玩家吃食物if (Distance(player.x, player.y, Food[i].x, Food[i].y) < player.r){player.r += Food[i].r / 50;Food[i].x = rand() % Wide_map;Food[i].y = rand() % Hight_map;Food[i].r = rand() % 5 + 1;Food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}}for (int j = 0; j < Enemy_num; j++){//敌人吃食物for (int i = 0; i < Food_num; i++){if (Distance(Enemy[j].x, Enemy[j].y, Food[i].x, Food[i].y) < Enemy[j].r){Enemy[j].r += Food[i].r / 50;Food[i].x = rand() % Wide_map;Food[i].y = rand() % Hight_map;Food[i].r = rand() % 5 + 1;Food[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}}//敌人吃敌人for (int i = 0; i < Enemy_num; i++){if (Distance(Enemy[j].x, Enemy[j].y, Enemy[i].x, Enemy[i].y) < Enemy[j].r&& Enemy[j].r > Enemy[i].r){Enemy[j].r += Enemy[i].r / 10;Enemy[i].x = rand() % Wide_map;Enemy[i].y = rand() % Hight_map;Enemy[i].r = rand() % 10 + 15;Enemy[i].color = RGB(rand() % 256, rand() % 256, rand() % 256);}if (Distance(Enemy[j].x, Enemy[j].y, Enemy[i].x, Enemy[i].y) < Enemy[i].r && Enemy[j].r < Enemy[i].r){Enemy[i].r += Enemy[j].r / 10;Enemy[j].x = rand() % Wide_map;Enemy[j].y = rand() % Hight_map;Enemy[j].r = rand() % 10 + 15;Enemy[j].color = RGB(rand() % 256, rand() % 256, rand() % 256);}}if (Distance(player.x, player.y, Enemy[j].x, Enemy[j].y) < player.r){//玩家吃敌人if (player.r > Enemy[j].r){player.r += Enemy[j].r / 10;Enemy[j].x = rand() % Wide_map;Enemy[j].y = rand() % Hight_map;Enemy[j].r = rand() % 10 + 15;Enemy[j].color = RGB(rand() % 256, rand() % 256, rand() % 256);}//敌人吃玩家else{if (invincibility == 0){Enemy[j].r += player.r / 10;player.x = Wide / 2;player.y = Hight / 2;player.r = 15;invincibility = Invincibility;}}}}
}
//显示
void Show()
{//设置地图SetWorkingImage(&map);//清屏cleardevice();//背景颜色setbkcolor(RGB(46, 47, 68));//划线颜色//setlinecolor(RGB(230,231,239));划线//for (int i = 0; i < Wide_map; i += 10)//{//	line(i, 0, i, Hight_map);//}//for (int i = 0; i < Hight_map; i += 10)//{//	line(0, i, Wide_map, i);//}//食物for (int i = 0; i < Food_num; i++){setfillcolor(Food[i].color);solidcircle(Food[i].x, Food[i].y, Food[i].r);}//敌人for (int i = 0; i < Enemy_num; i++){setfillcolor(Enemy[i].color);solidcircle(Enemy[i].x, Enemy[i].y, Enemy[i].r);}//玩家setfillcolor(RED);solidcircle(player.x, player.y, player.r);SetWorkingImage();int x = player.x - (Wide / 2);int y = player.y - (Hight / 2);//防止窗口越界if (x < 0){x = 0;}if (y < 0){y = 0;}if (x > Wide_map - Wide){x = Wide_map - Wide;}if (y > Hight_map - Hight){y = Hight_map - Hight;}//把map输出到窗口上putimage(0, 0, Wide, Hight, &map, x, y);
}
int main()
{initgraph(Wide, Hight);Inset();//缓冲BeginBatchDraw();while (1){if (invincibility > 0)invincibility--;Show();//玩家操作Player_move();Enemy_move();EatFood();//刷新FlushBatchDraw();}closegraph();return 0;
}

前言：