Snake C language

step ：

1、 Create snake object 、 Food object

coordinate ：

struct  COOR{

 int  X;  

 int  Y;

};

// Snake object

struct SANKE{

 struct COOR snake[MAXSIZE];

 int size;

}snake;

// Food object

struct FOOD{

 struct COOR food;

}food;

 

// Define the score

int score=0;

2、 Initialize snake 、 Initializing food

// Initialize snake

void InitSnake()

{

 snake.size=2;

 // Snakehead

 snake.snake[0].X=WIDE/2;

 snake.snake[0].Y=HEIGHT/2;

 // Snake-body.

 snake.snake[1].X=WIDE/2-1;

 snake.snake[1].Y=HEIGHT/2;

}

// Initializing food

void InitFood()

{

 food.food.X = rand() % HEIGHT;

 food.food.Y = rand() % WIDE;

}

// Change the position of the console cursor Move the cursor to the position of the snake head   Similarly, you can change the position of the cursor to the food

COORD coord;

coord.X=snake.snake[0].X;

coord.Y=snake.snake[0].Y;

SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),coord);

3、 Control process

1） The end condition ： The snake head touches the wall     The head of a snake collides with its body

 

// The snake head touches the wall     If the wall has been touched, the subsequent operations will not be performed

while（

           snake.snake[0].X >=0 && snake.snake[0].X<WIDE  

 &&

           snake.snake[0].Y >=0 && snake.snake[0].Y<height

         ）

 

// The head of a snake touches its body

for(int i=1;i<snake.size;i++)

{

 if(snake.snake[0].X==snake.snake[i].X && snake.snake[0].Y==snake.snake[i].Y )

  return;

}

2） Snakeheads collide with food ：

  Snake growth   The disappearance of food produces new food     Scores increase     Movement speed increases

 

if(snake.snake[0].X==food.food.X && snake.snake[0].Y==food.food.Y)

{

 // Snake growth

 snake.size++;

 // The disappearance of food produces new food  

 InitSnake();

 // Scores increase

 score+=10;

 // Movement speed increases

   

}

3） The movement of the snake ： Auto move     Control movement

 

void SnakeMove()

{

 if(_kbhit())  // Check whether there is input If there is one, carry out

 {

  char key=_getch();

 }

 switch (key)

 {

 case 'w':kx = 0; ky = -1; break;// On

 case 's':kx = 0; ky = +1 ; break;// Next

 case 'd':kx = +1; ky = 0; break;// Right

 case 'a':kx = -1; ky = 0; break;// Left

 default:

  break;

 }

 // Move The former one is given to the latter one

 for (int i = snake.size - 1; i > 0; i--)

 {

  snake.snake[i].X = snake.snake[i - 1].X;

  snake.snake[i].Y = snake.snake[i - 1].Y;

 }

 snake.snake[0].X += kx;

 snake.snake[0].Y += ky;

}

4） Show scores ： Ranking List

void ShowScore()

{

 COORD coord;

 coord.X = 0;

 coord.Y = HEIGHT + 2;

 SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);

 printf("Game Over!!!\n");

 printf(" Final score: ：%d\n", score);

 return;

}

4、 The graphical interface  

// Set wall

void SnakeWall()

{

 for (int i = 0; i <= HEIGHT; i++)

 {

  for (int j = 0; j <= WIDE; j++)

  {

   if (j == WIDE)

   {

    printf("|");

   }

   else if (i == HEIGHT)

   {

    printf("_");

   }

   else

    printf(" ");

  }

  printf("\n");

 }

}

Expanding knowledge ：

1、SetConsoleCursorPosition function

The header file ：#include<conio.h>

             #include<Windows.h>

typedef struct _COORD{

 SHORT X;

 SHORT Y;

}COORD;// yes Windows API A structure defined in , Represents the coordinates of a character on the console screen

 

COORD coord;// Define structure variables

// Set coordinates

coord.X=10;  

coord.Y=20

SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),coord);

2、getch() Take a character from the console without echo

Return value ： Read characters ASCII code

The header file ：#include<conio.h>

usage ：char key=_getch();

3、kbhit() In a non blocking manner , Check whether there is keyboard input

usage ：if(kbhit()){……}

Return value ： If yes, it is non-zero , Nothing is false 0

The header file ：#include<conio.h>

Compilation error attempt ：_kbhit();

4、SetConsoleCursorInfo() // Put it in main() Function

typedef struct _CONSOLE_CURSOR_INFO

{

 DWORD dwSize;// size

 BOOL bVisible;// Whether or not visible

}CONSOLE_CURSOR_INFO;// Describe cursor information   Hide cursor position

usage ：

CONSOLE_CURSOR_INFO cci;

cci.dwSize=sizeof(cci);

cci.bVisible=FALSE;

SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE),&cci)

Comprehensive code ：

The header file snake.h in ：

#ifndef __OJ_H__

#define __OJ_H__

#include<stdlib.h>

#include<string.h>

#include<stdio.h>

#include<assert.h>

#include<stdbool.h>

#include<math.h>

#include<time.h>

#include<conio.h>

#include<Windows.h>

#define MAXSIZE 10

#define WIDE 60

#define HEIGHT 20

struct  COOR {

int  X;

int  Y;

};

// Snake object

struct SANKE {

struct COOR snake[MAXSIZE];

int size;

}snake;

// Food object

struct FOOD {

struct COOR food;

}food;

// Initialize snake

void InitSnake();

// Initializing food

void InitFood();

void SnakeMove();

void SnakeWall();

void InitCursorPosition();

void ShowScore();

#endif // !__OJ_H__

text.c in :

#include"oj.h"

int main()

{

// hide cursor

CONSOLE_CURSOR_INFO cci;

cci.dwSize = sizeof(cci);

cci.bVisible = FALSE;

SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cci);

_kbhit();

srand((unsigned int)time(NULL));

SnakeWall();

InitSnake();

InitFood();

InitCursorPosition();

SnakeMove();

 

return 0;

}

snake.c in : 

#define _CRT_SECURE_NO_WARNINGS

#include"oj.h"

// achievement

int score = 0;

// Coordinates after moving

int kx = 0;

int ky = 0;

// Record the snake tail coordinates

int lastX = 0;

int lastY = 0;

// Speed

int sleepSpeed = 400;

// Initialize snake

void InitSnake()

{

snake.size = 2;

// Snakehead

snake.snake[0].X = WIDE / 2;

snake.snake[0].Y = HEIGHT / 2;

// Snake-body.

snake.snake[1].X = WIDE / 2 - 1;

snake.snake[1].Y = HEIGHT / 2;

}

// Initializing food

void InitFood()

{

food.food.X = rand() % WIDE;

food.food.Y = rand() % HEIGHT;

}

// Set the position of the coordinates on the console

void InitCursorPosition()

{

COORD coord = { 0 };

for (int i = 0; i < snake.size; i++)

{

 coord.X = snake.snake[i].X;

 coord.Y = snake.snake[i].Y;

 SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);

 if (i == 0)

 {

  putchar('@');

 }

 else

  putchar('*');

}

// Remove snake tail

coord.X = lastX;

coord.Y = lastY;

SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);

putchar(' ');

// The coordinates of the food

coord.X = food.food.X;

coord.Y = food.food.Y;

SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);

putchar('#');

}

// Set wall

void SnakeWall()

{

for (int i = 0; i <= HEIGHT; i++)

{

 for (int j = 0; j <= WIDE; j++)

 {

  if (j == WIDE)

  {

   printf("|");

  }

  else if (i == HEIGHT)

  {

   printf("_");

  }

  else

   printf(" ");

 }

 printf("\n");

}

}

// Snake moves

void SnakeMove()

{

char key = 'd';// By default, go to the right

while (snake.snake[0].X >= 0 && snake.snake[0].X < WIDE

 &&

 snake.snake[0].Y >= 0 && snake.snake[0].Y < HEIGHT)

{

 //SnakeWall();

 InitCursorPosition(); // Redraw the snake

 if (_kbhit())  // Check whether there is input If there is one, carry out

 {

  key = _getch();

 }

 switch (key)

 {

 case 'w':kx = 0; ky = -1; break;// On

 case 's':kx = 0; ky = +1; break;// Next

 case 'd':kx = +1; ky = 0; break;// Right

 case 'a':kx = -1; ky = 0; break;// Left

 default:

  break;

 }

 // The head of a snake touches its body

 for (int i = 1; i < snake.size; i++)

 {

  if (snake.snake[0].X == snake.snake[i].X && snake.snake[0].Y == snake.snake[i].Y)

  {

   ShowScore();

   return;

  }

   

 }

 // Snakeheads collide with food

 if (snake.snake[0].X == food.food.X && snake.snake[0].Y == food.food.Y)

 {

  // Snake growth

  snake.size++;

  // The disappearance of food produces new food  

  InitFood();

  // Scores increase

  score += 10;

  // Movement speed increases

  sleepSpeed -= 50;

 }

 // Storage snaketail

 lastX = snake.snake[snake.size - 1].X;

 lastY = snake.snake[snake.size - 1].Y;

 // Move The former one is given to the latter one

 for (int i = snake.size - 1; i > 0; i--)

 {

  snake.snake[i].X = snake.snake[i - 1].X;

  snake.snake[i].Y = snake.snake[i - 1].Y;

 }

 snake.snake[0].X += kx;

 snake.snake[0].Y += ky;

 // Visually make the snake move

 Sleep(sleepSpeed);

 //system("cls");

}

ShowScore();

}

void ShowScore()

{

COORD coord;

coord.X = 0;

coord.Y = HEIGHT + 2;

SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);

printf("Game Over!!!\n");

printf(" Final score: ：%d\n", score);

return;

}