The C language implements the snake game
- 2020-06-03 07:46:17
- OfStack
Recently the computer, see my snake game in the last semester of c code, feel really is a little long, but the implementation should also be better understood, then move your own code, online writing snake c language a lot, I this also is only for you as a reference.
My code runs under Windows because I need the windows.h library.
Then I also made a simple ai mode, which was good in the early stage with no obstacles, but in the later stage when the snake got longer, there would be bug.
Okay, just code it:
1) Header files and macro definitions
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<conio.h>
#include<windows.h>
#define SNAKE_MAX_LENGTH 20
#define SNAKE_HEAD 'H'
#define SNAKE_BODY 'X'
#define BLANK_CELL ''
#define SNAKE_FOOD '$'
#define WALL_CELL '*'
2) Declaration of various implementation functions
/*snake stepping: dy = -1(up) 1(dowm) 0(no move); dx = -1(left), 1(right), 0(no move)*/
void snakemove(int, int);
//to write dowm the current location of the snake
void put_money(void);
void output(void);
// to put the current map on the screen
void initial_the_game(void);
void put_accelerate(void);
// @ is a special food which can speed up your snake.
int judge(int, int);
/* when it comes to ai, it is used to judge whether the next step is movable. */
int dis(int, int);
// when it coomes to ai, it is used to calculate the current distence //between the snake head and the food.
void welcome(void); // the game introduction.
void gameover(void);
void edition_handed(void);
// the edition in which you can play by yourself.
void edition_presentation(void);
// the edition in which the snake can go automatically.
3) Various global variables
// define vars for snake,notice name of vars in c
int snakeX[SNAKE_MAX_LENGTH] = {1, 2, 3, 4, 5};
int snakeY[SNAKE_MAX_LENGTH] = {1, 1, 1, 1, 1};
int snakeLength = 5;
int gamestate = 1;
int current_speed = 600;
int score = 0;
char edition_choose; // for player to choose the edition.
int con = 1; // to judge the initial state of the game;
int energy = 0; // write down the condition to accelerate by eating $.
//the following part is to realize the simple ai .
const char movable[4] = {'a', 'd', 's', 'w'};
int distance[4] = {9999, 9999, 9999, 9999};
int fx = 6, fy = 6; // the coordinate of the food $
4) map
char map[12][12] =
{"************",
"*XXXXH *",
"* *",
"* *",
"* *",
"* *",
"* $ *",
"* *",
"* @ *",
"* *",
"* *",
"************"};
5) Main function (optional mode)
int main() {
while (con) {
welcome();
int flag = 1;
while (flag) {
edition_choose = getch(); //choose the edition
if (edition_choose == 'h') {
edition_handed();
flag = 0;
}
else if (edition_choose == 'p') {
edition_presentation();
flag = 0;
}
else {
printf("Please press the correct bottom -,- ...\n");
}
}
gameover();
}
return 0;
}
6) Manual mode implementation
void edition_handed(void) {
system("cls");
output();
char ch = 'd';
while (gamestate) {
switch (ch) {
case 'a': // go left
while (1) {
snakemove(-1, 0);
Sleep(current_speed);
if (gamestate == 0) // to break the loop if the snake hit the wall or itself.
break;
if (kbhit() != 0) { // to change the direction
ch = getch();
if (ch == 's' || ch == 'w')
break;
else
ch = 'a';
}
}
break;
case 'd': // go right
while (1) {
snakemove(1, 0);
Sleep(current_speed);
if (gamestate == 0)
break;
if (kbhit() != 0)
ch = getch();
if (ch == 's' || ch == 'w')
break;
else
ch = 'd';
}
break;
case 's': // go down
while (1) {
snakemove(0, 1);
Sleep(current_speed);
if (gamestate == 0)
break;
if (kbhit() != 0)
ch = getch();
if (ch == 'a' || ch == 'd')
break;
else
ch = 's';
}
break;
case 'w': // go up
while (1) {
snakemove(0, -1);
Sleep(current_speed);
if (gamestate == 0)
break;
if (kbhit() != 0)
ch = getch();
if (ch == 'a' || ch == 'd')
break;
else
ch = 'w';
}
break;
}
if (gamestate == 0)
break;
}
return;
}
7) Automatic mode implementation
void edition_presentation(void) { // for ai
system("cls");
int i, min = 10000;
output();
char ch;
char quit = 'o';
int k;
while (gamestate) { // find the shortest way;
min = 10000;
if (judge(-1, 0)) distance[0] = dis(-1, 0);
if (judge(1, 0)) distance[1] = dis(1, 0);
if (judge(0, 1)) distance[2] = dis(0, 1);
if (judge(0, -1)) distance[3] = dis(0, -1);
for (i = 0; i < 4; i++) {
if (min >= distance[i]) {
min = distance[i];
k = i;
}
}
Sleep(current_speed);
switch (movable[k]) {
case 'a': // go left
snakemove(-1, 0);
break;
case 'd': // go right
snakemove(1, 0);
break;
case 's': // go down
snakemove(0, 1);
break;
case 'w': // go up
snakemove(0, -1);
break;
}
if (gamestate == 0)
break;
system("cls");
output();
}
return;
}
8) Other auxiliary functions
The welcome screen
void welcome(void) { // just for some introduction
printf("WELCOME TO THE SNAKE'S WORLD !!!!\n");
printf("\n");
printf("\n");
printf("Please choose the edition you want.\n");
printf("\n");
printf("\n");
printf("The 'h' is for the hand-operated and the 'p' is for the simple presentation\n");
printf("\n");
printf("\n");
printf("Attention: the presentation still has a liitle bug, while it can be moving right for a period of time...\n ");
return;
}
End of game interface
void gameover(void) { // give you some introduction when you lose the game.
system("cls");
printf("Game over!!!\n");
printf("Do you want to continue? y or n\n");
char start; // in order to judge whether you still want to play the game.
while (1) {
start = getch();
if (start == 'y') {
system("cls");
initial_the_game();
break;
} else if (start == 'n') {
system("cls");
con = 0; // in order to let the game end.
printf("See you next time! ^-^\n");
break;
} else {
printf("Please press the correct buttom.\n");
}
}
}
Image implementation mode
void output(void) { // put the cuttent game map.
printf("THE INTERESTING SNAKE GAME CREATED BY LONGJ =,=\n");
printf("use w~s~a~d to control the snake's movement\n");
printf("ATTENTION: the @ can speed up your lovely snake~~\n");
int i, j;
for (i = 0; i < 12; i++) {
for (j = 0; j < 12; j++) {
printf("%c", map[i][j]);
if (j == 11)
printf("\n");
}
}
printf("Your current_speed is %d\n", current_speed);
printf("The number of your food undigested is %d (when it comes to 5, your speed will be accelerated!) \n", energy);
printf("SCORE = %d\n", score);
return;
}
The snake's walk is realized
/*snake stepping: dy = -1(up) 1(dowm) 0(no move); dx = -1(left), 1(right), 0(no move)*/
void snakemove(int, int);
//to write dowm the current location of the snake
void put_money(void);
void output(void);
// to put the current map on the screen
void initial_the_game(void);
void put_accelerate(void);
// @ is a special food which can speed up your snake.
int judge(int, int);
/* when it comes to ai, it is used to judge whether the next step is movable. */
int dis(int, int);
// when it coomes to ai, it is used to calculate the current distence //between the snake head and the food.
void welcome(void); // the game introduction.
void gameover(void);
void edition_handed(void);
// the edition in which you can play by yourself.
void edition_presentation(void);
// the edition in which the snake can go automatically.
The realization of food placement
/*snake stepping: dy = -1(up) 1(dowm) 0(no move); dx = -1(left), 1(right), 0(no move)*/
void snakemove(int, int);
//to write dowm the current location of the snake
void put_money(void);
void output(void);
// to put the current map on the screen
void initial_the_game(void);
void put_accelerate(void);
// @ is a special food which can speed up your snake.
int judge(int, int);
/* when it comes to ai, it is used to judge whether the next step is movable. */
int dis(int, int);
// when it coomes to ai, it is used to calculate the current distence //between the snake head and the food.
void welcome(void); // the game introduction.
void gameover(void);
void edition_handed(void);
// the edition in which you can play by yourself.
void edition_presentation(void);
// the edition in which the snake can go automatically.
ai auxiliary function
/*snake stepping: dy = -1(up) 1(dowm) 0(no move); dx = -1(left), 1(right), 0(no move)*/
void snakemove(int, int);
//to write dowm the current location of the snake
void put_money(void);
void output(void);
// to put the current map on the screen
void initial_the_game(void);
void put_accelerate(void);
// @ is a special food which can speed up your snake.
int judge(int, int);
/* when it comes to ai, it is used to judge whether the next step is movable. */
int dis(int, int);
// when it coomes to ai, it is used to calculate the current distence //between the snake head and the food.
void welcome(void); // the game introduction.
void gameover(void);
void edition_handed(void);
// the edition in which you can play by yourself.
void edition_presentation(void);
// the edition in which the snake can go automatically.
Initialization function after game over:
void initial_the_game(void) {
int i, j, count = 1;
snakeLength = 5;
gamestate = 1;
fx = fy = 6;
current_speed = 600;
for (i = 0; i < 5; i++)
snakeY[i] = 1;
for (i = 0; i < 5; i++) {
snakeX[i] = count++;
}
for (j = 0; j < 12; j++) {
map[0][j] = '*';
map[11][j] = '*';
}
for (i = 1; i < 11; i++) {
map[i][0] = map[i][11] = '*';
for (j = 1; j < 11; j++)
map[i][j] = ' ';
}
map[fy][fx] ='$';
map[8][4] = '@';
for (i = 0; i< 4; i++) {
distance[i] = 9999;
}
for (i = 0; i < 4; i++)
map[snakeY[i]][snakeX[i]] = 'X';
map[snakeY[4]][snakeX[4]] = 'H';
return;
}
Summary:
It is not difficult to see that c language code is rather lengthy, and it is 10 minutes' trouble to implement the initial function. If there is any mistake, all the mistakes will be made, resulting in the game can't be played continuously. When the blogger wrote it, he was trashed for a long time =_=
Therefore, I am learning c++ now. I hope I can change this lengthy c code into more concise and more readable c++ code after I become more proficient in class concepts and other things.
(Ok, it has been updated. I have written a relatively simple C++ snake, which really makes my thinking much clearer and the code more readable.)
This blog is for those who want to use c to write about snakes. There is no problem with this blog