遊戲整體框架

int main(){
  GameBegin();
  return 0;
}
//開始遊戲
void GameBegin(){
  //確定遊戲初始設定
  srand(time(0));//srand()很耗效能，故只引用一次於此
  HideCursor();//隱藏游標
  system("chcp 65001 > nul");//中文庫
  system("title Greedy Snake");//設定視窗名稱
  system("mode con cols=100 lines=40");//設定視窗大小
  //進入標題頁、歡迎頁與目錄頁
  GameTitle();
  Welcome();
  Menu();
}
//進入選單並通過選項進入不同介面
void Menu(){
  MenuAppearance();
​
  while(1){
    if(optionDefault) {
      StressOption(option);
      optionDefault = 0;
     }else {
      int prvoption = option;
      int ch = getch();
      if (ch == 'q') exit(0);
      if (ch == UP || ch == 'w') option = (--option + 4) % 5 + 1;
      else if (ch == DOWN || ch == 's') option = (++option + 4) % 5 + 1;
      else if(ch == 13){//回車
        ChooseOption(option);
       }else continue;
​
      StressOption(option);
      RenewPrvOption(prvoption);
​
​
     }
   }
}
//全域性引數
int wallcolor = 3,snakeheadcolor = 10,snakebodycolor = 10;
int moder = 0,model = 0,moden = 1,modee = 0;
int recordbroken = 0;
int wallxlen = 60;
int wallylen = 30;
int bornx = 12;
int borny = 6;
int bornlen = 4;
int curlen;
int option = 1;
int optionDefault = 1;
int speed = 150;
int speed_change = 1;
int curscore = 0;
int maxscore = 0;
int coindoubled = 0;
int totalcoins = 0;
int foodweight = 100;
int direction = RIGHT;
​
//函式結構
//開始遊戲
void GameBegin();
//歡迎
void Welcome();
//遊戲標題
void GameTitle();
//進入選單
void Menu();
void MenuAppearance();
void StressOption(int option);
void RenewPrvOption(int prvoption);
void ChooseOption(int option);
//進入商城
void Shop();
void ShopAppearance();
//新增提示
void Notes();
//建立地圖
void CreateMap();
//移動游標
void gotoxy(int x,int y);
//定義蛇的單個節點
typedef struct SNAKE
{
  int x;
  int y;
  struct SNAKE *next;
} Snake;
//建立初始蛇頭
Snake *linked_list_head = NULL;
//生成初始蛇
void CreateSnake();
//運行遊戲
void GameRun();
//移動蛇身
void MoveSnake(int direction);
enum{UP = 72,LEFT = 75,RIGHT = 77,DOWN = 80};
int direction = RIGHT;
//移動蛇身的四種情況
void Move(int direction);
void EatFood(int direction);
void EatCoin(int direction);
void Failed();
//隱藏游標
void HideCursor();
void color(int c);
typedef struct FOOD{
  int x;
  int y;
} Food;
Food food;
void CreateFood();
typedef struct COIN{
  int x;
  int y;
} Coin;
Coin coin;
typedef struct GOODS{
  int shop_amount;
  int player_amount;
  int price;
} Goods;
Goods goods1_SpeedDown = {10,4,10};
Goods goods2_SpeedMid = {10,4,10};
Goods goods3_SpeedUp = {10,4,10};
Goods goods4_CoinDoubled = {10,4,10};
void CreateCoin();
int is_contradicted(int x,int 
 
y);
void GameReplay();
void GameIntro();
void AboutUs();
void LongSnakeMode();
void RandSmallWallMode();
void ExtremeSmallMode();
void OrderPage();
void OrderPageAppearance();
void CheatProgramme();
void EasterEgg();
void HiddenAboutUs();
void HiddenGameIntro();
void HiddenEasterEgg();

核心之一：建立蛇及食物與金幣

//建立初始蛇頭
Snake *linked_list_head = NULL;
void CreateSnake(){
  Snake *head = malloc(sizeof(Snake));
  head->x = bornx;
  head->y = borny;
  head->next = NULL;
  linked_list_head = head;//賦值蛇頭
​
  for(int i = 1;i <= bornlen;i++){
    Snake *tail = malloc(sizeof(Snake));
    tail->x = bornx + i * 2;
    tail->y = borny;
    tail->next = NULL;
    head->next = tail;
    head = tail;
   }
  //Print
  head = linked_list_head;
  while(head->next != NULL){
    color(snakebodycolor);
    gotoxy(head->x,head->y);
    printf("□");
    head = head->next;
   }
  color(snakeheadcolor);
  gotoxy(head->x,head->y);
  printf("■");
  head = head->next;
}
//基礎函式：判斷生成的食物、金幣處是否原先有物體
int is_contradicted(int x,int y){
  if(x <= 1|| x >= wallxlen - 3 || y <= 0 || y >= wallylen - 1) return 1;
  Snake *p = linked_list_head;
  while(p != NULL && p->next != NULL){
    if(p->x == x && p->y == y) return 1;
    p = p->next;
   }
  return 0;
}
void CreateCoin(){
  int newx,newy;
  do {
    int x = 2 * rand();
    newx = 2 * (x % 20);
    newy = x % 25;
   }while(is_contradicted(newx,newy) || (coin.x == food.x && coin.y == food.y));
​
  coin.x = newx;
  coin.y = newy;
  color(14);
  gotoxy(coin.x,coin.y);
  printf("◆");
}
void CreateFood(){
  int newx,newy;
  do {
    newx = 2 * (rand() % 20);
    newy = rand() % 25;
   }while(is_contradicted(newx,newy));
​
  food.x = newx;
  food.y = newy;
  color(12);
  gotoxy(food.x,food.y);
  printf("●");
​
}
 

核心之二：移動蛇及吃食物、金幣與撞到牆或蛇身

void MoveSnake(int direction){
​
  Snake *p = linked_list_head;
  while(p != NULL && p->next != NULL){
    p = p->next;
   }
  if(p->x == food.x && p->y == food.y){
    EatFood(direction);
​
   }else if(is_contradicted(p->x,p->y)){
    Failed();
​
   }else if(p->x == coin.x && p->y == coin.y){
    EatCoin(direction);
   }else {
    Move(direction);
   }
}
//移動蛇身的四種情況
void Move(int direction){
  //找到連結串列尾部
  Snake *p = linked_list_head;
  while(p != NULL && p->next != NULL){
    p = p->next;
   }
​
  Snake *temp = malloc(sizeof(Snake));
  temp->next = NULL;
  if(direction == RIGHT) {
    temp->x = p->x + 2;
    temp->y = p->y;
   }else if(direction == LEFT){
    temp->x = p->x - 2;
    temp->y = p->y;
   }else if(direction == UP){
    temp->x = p->x;
    temp->y = p->y - 1;
   }else if(direction == DOWN){
    temp->x = p->x;
    temp->y = p->y + 1;
   }
  p->next = temp;
  color(snakeheadcolor);
  gotoxy(temp->x,temp->y);
  printf("■");
  color(snakebodycolor);
  gotoxy(p->x,p->y);
  printf("□");
  gotoxy(linked_list_head->x, linked_list_head->y);
  printf("  ");
  //刪除尾部
  temp = linked_list_head->next;
  free(linked_list_head);
  linked_list_head = temp;
​
​
}
void EatFood(int direction){
  Snake *p = linked_list_head;
  while(p != NULL && p->next != NULL){
    p = p->next;
   }
​
  Snake *temp = malloc(sizeof(Snake));
  temp->next = NULL;
  if(direction == RIGHT) {
    temp->x = p->x + 2;
    temp->y = p->y;
   }else if(direction == LEFT){
    temp->x = p->x - 2;
    temp->y = p->y;
   }else if(direction == UP){
    temp->x = p->x;
    temp->y = p->y - 1;
   }else if(direction == DOWN){
    temp->x = p->x;
    temp->y = p->y + 1;
   }
  p->next = temp;
  color(snakebodycolor);
  gotoxy(p->x,p->y);
  printf("□");
  color(snakeheadcolor);
  gotoxy(temp->x,temp->y);
  printf("■");
​
  curscore += foodweight;
  if(curscore >= 500 && curscore <= 1500 && speed_change){
    speed = 140;
    foodweight += 100;
   }else if(curscore >= 1500 && curscore <= 3000 
 
&& speed_change){
    speed = 120;
    foodweight += 100;
   }else if(curscore >= 3000 && curscore <= 6000 && speed_change){
    speed = 100;
    foodweight += 100;
   }else if(curscore >= 6000 && curscore <= 15000 && speed_change){
    speed = 80;
    foodweight += 100;
   }else if(curscore >= 15000 && speed_change){
    speed = 60;
    foodweight += 100;
   }
  if(curscore > maxscore) recordbroken = 1;
  maxscore = maxscore < curscore ? curscore : maxscore;
  curlen++;
  Notes();
​
​
  CreateFood();
}
void EatCoin(int direction){
  Move(direction);
  totalcoins += 1 + coindoubled;
  Notes();
  CreateCoin();
}
void Failed(){
  //MessageBox(NULL,TEXT("Sorry,you failed.\nDo you want to replay the game?"),L"",MB_YESNO);
  if(moder == 0 && model == 0 && moden == 1 && modee == 0)
    GameReplay();
  else if(moder == 1 && model == 0 && moden == 0 && modee == 0)
    RandSmallWallMode();
  else if(moder == 0 && model == 1 && moden == 0 && modee == 0)
    LongSnakeMode();
  else if(moder == 0 && model == 0 && moden == 0 && modee == 1)
    ExtremeSmallMode();
  //MessageBeep(MB_OK);
  //TODO
​
}

核心之三：新增遊戲模式

//只用改變一下引數即可，這裡體現了用引數代替數值的好處
void ExtremeSmallMode(){
  system("cls");//清屏
  color(7);//調回白色
  //全域性變數賦回初值
  moder = 0,model = 0,moden = 0,modee = 1;
  recordbroken = 0;
  wallxlen = 20;
  wallylen = 10;
  bornx = 2;
  borny = 1;
  bornlen = 4;
  curlen = 5;
  curscore = 0;
  coindoubled = 0;
  foodweight = 100;
  speed = 150;
  speed_change = 1;
  linked_list_head = NULL;
  direction = RIGHT;
  //從遊戲介面重新開始
  GameRun();
}

核心之四：切換遊戲介面

void GameIntro(){
  system("cls");
  color(7);
  printf("\n                Some Game Information");
  gotoxy(0,4);
  printf("一、About Pages:\n\n"
      "1.There are many pages (including hidden pages) in this game.  :-)\n"
      "\n二、About Press Keys:\n\n"
      "1.On every game, you can press 'q' to quit the game at any time.\n"
      "2.There are tips (If it is hard to think of) .\n"
      "\n三、About Game:\n\n"
      "1.Regular rules in the game Greedy Snake.\n"
      "2.Yellow diamonds are coins while red circulars are food.\n"
      "3.There are Best Score and Current Score on the right in the game running page.\n"
      "4.There are speed and score of each food too and they will increase as score grows.\n"
      "5.There are total coins and your goods which you should use it properly.\n"
      "6.You can go shopping.\n"
      "7.There are many modes you can explore.\n"
      "\n四、About Game Version:\n"
      " \n"
      "1.It takes plenties of version to create this immature game.\n\n"
      "etc......");
​
  gotoxy(65,35);
  printf("Press \"b\" to get back to menu.");
  while(1){
    int ch = getch();
    if(ch == 'q') exit(0);
    if(ch == 'b') break;
    if(ch == 'h') HiddenGameIntro();
   }
  color(3);
  Menu();
}

標頭檔案

#include<stdio.h>
#include<windows.h>
#include<conio.h>
#include <time.h>//隨機數

遊戲初始設定（視窗名稱、大小、引用中文庫）

 system("chcp 65001 > nul");//中文庫
 system("title Greedy Snake");//設定視窗名稱
 system("mode con cols=100 lines=40");//設定視窗大小

*響應鍵盤操作

//用迴圈和int ch = getch();
//example：
while(1){
  int ch = getch();
  if(ch == 'q') exit(0);
  if(ch == 'b') break;
  if(ch == 'h') HiddenGameIntro();
}
//tips：上下左右鍵是雙鍵值，需特殊處理
while(1){
  int ch = getch();
  
  if(ch == 224) ch = getch();//解決上下左右是雙鍵值的問題
  
  if(ch == 'q') exit(0);
  if(ch == 'b') break;
  if(ch == 'h') HiddenGameIntro();
}

列舉型方便一些

enum{UP = 72,LEFT = 75,RIGHT = 77,DOWN = 80};

隱藏游標

void HideCursor()
{
    CONSOLE_CURSOR_INFO curInfo;
    curInfo.dwSize = 1;
    curInfo.bVisible = FALSE;
    HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleCursorInfo(handle, &curInfo);
}

改變顏色

void color(int c)
{
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), c); //顏色設定
    //注：SetConsoleTextAttribute是一個API（應用程式程式設計介面）
    // GetConsole
    //SetCurrentConsoleFontEx();
}

移動游標

void gotoxy(int x,int y){
    COORD position = {x,y};
    HANDLE handleOut = GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleCursorPosition(handleOut,position);
}

一種比較麻煩的遊戲結束重新開始或回到原來模式的方法（即用全域性變數引數）

void Failed(){
    if(moder == 0 && model == 0 && moden == 1 && modee == 0)
        GameReplay();
    else if(moder == 1 && model == 0 && moden == 0 && modee == 0)
        RandSmallWallMode();
    else if(moder == 0 && model == 1 && moden == 0 && modee == 0)
        LongSnakeMode();
    else if(moder == 0 && model == 0 && moden == 0 && modee == 1)
        ExtremeSmallMode();
}

一種比較麻煩的商店體系

typedef struct COIN{
    int x;
    int y;
} Coin;
Coin coin;
typedef struct GOODS{
    int shop_amount;
    int player_amount;
    int price;
} Goods;
Goods goods1_SpeedDown = {10,4,10};
Goods goods2_SpeedMid = {10,4,10};
Goods goods3_SpeedUp = {10,4,10};
Goods goods4_CoinDoubled = {10,4,10};

void Shop(){
    ShopAppearance();

    while(1){
        int ch = getch();
        if(ch == 'q') exit(0);
        if(ch == 'b') Failed();
        if(ch == 'm') Menu();
        if(ch == '1'){
            if(totalcoins >= goods1_SpeedDown.price && goods1_SpeedDown.shop_amount > 0){
                totalcoins -= goods1_SpeedDown.price;
                goods1_SpeedDown.player_amount++;
                goods1_SpeedDown.shop_amount--;
                ShopAppearance();
                MessageBox(NULL,TEXT("Purchase successful!"),L"",MB_OK);
            }else {
                MessageBox(NULL,TEXT("Sorry, you can not buy it."),L"",MB_OK);
            }
        }
        if(ch == '2'){
            if(totalcoins >= goods2_SpeedMid.price && goods2_SpeedMid.shop_amount > 0){
                totalcoins -= goods2_SpeedMid.price;
                goods2_SpeedMid.player_amount++;
                goods2_SpeedMid.shop_amount--;
                ShopAppearance();
                MessageBox(NULL,TEXT("Purchase successful!"),L"",MB_OK);
            }else {
                MessageBox(NULL,TEXT("Sorry, you can not buy it."),L"",MB_OK);
            }
        }
        if(ch == '3'){
            if(totalcoins >= goods3_SpeedUp.price && goods3_SpeedUp.shop_amount > 0){
                totalcoins -= goods3_SpeedUp.price;
                goods3_SpeedUp.player_amount++;
                goods3_SpeedUp.shop_amount--;
                ShopAppearance();
                MessageBox(NULL,TEXT("Purchase successful!"),L"",MB_OK);
            }else {
                MessageBox(NULL,TEXT("Sorry, you can not buy it."),L"",MB_OK);
            }
        }
        if(ch == '4'){
            if(totalcoins >= goods4_CoinDoubled.price && goods4_CoinDoubled.shop_amount > 0){
                totalcoins -= goods4_CoinDoubled.price;
                goods4_CoinDoubled.player_amount++;
                goods4_CoinDoubled.shop_amount--;
                ShopAppearance();
                MessageBox(NULL,TEXT("Purchase successful!"),L"",MB_OK);
            }else {
                MessageBox(NULL,TEXT("Sorry, you can not buy it."),L"",MB_OK);
            }
        }
    }
}

一種比較麻煩的偽命令列介面（即用gets(str)函式輸入以換行鍵為結束標誌的字串）

void OrderPage(){
  system("cls");//清屏
  color(7);//調回白色
  OrderPageAppearance();
  while(1){
    char s[100];
    gotoxy(33,0);
    gets(s);
    if(strcmp(s,"back") == 0) Failed();
    if(strcmp(s,"quit") == 0) exit(0);
    if(strcmp(s,"go to shop") == 0) Shop();
    if(strcmp(s,"go to menu") == 0) Menu();
    if(strcmp(s,"go to LongSnakeMode") == 0) LongSnakeMode();
    if(strcmp(s,"go to RandSmallWallMode") == 0) RandSmallWallMode();
    if(strcmp(s,"go to ExtremeSmallMode") == 0) ExtremeSmallMode();
    if(strcmp(s,"color turns red") == 0){
      wallcolor = 4;
      snakeheadcolor = 4;
      snakebodycolor = 14;
     }
    if(strcmp(s,"color turns blue") == 0){
      wallcolor = 3;
      snakeheadcolor = 10;
      snakebodycolor = 10;
     }
    if(strcmp(s,"color turns purple") == 0){
      wallcolor = 5;
      snakeheadcolor = 5;
      snakebodycolor = 5;
     }
      //if(strcmp(s,"fire up") == 0) FireUp();
    if(strcmp(s,"cheat the programme") == 0){
      CheatProgramme();
      MessageBox(NULL,TEXT("You cheat the programme successful!"),L"",MB_OK);
      OrderPage();
     }
    if(strcmp(s,"The blue wind will let the world rest") == 0) EasterEgg();
    else OrderPage();
   }
}