小游戏-贪吃蛇

 在终端运行的一个小游戏 wasd 上下左右  

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<windows.h>

#define High 20
#define Width 30
int moveDirection;
int food_x, food_y;
int canvas[High][Width] = { 0 };
void gotoxy(int x, int y) {
	HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
	COORD pos;
	pos.X = x;
	pos.Y = y;
	SetConsoleCursorPosition(handle, pos);
}
void HideCursor() {
	CONSOLE_CURSOR_INFO cursor_info = { 1, 0 };
	SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cursor_info);
}
void move() {
	int i, j;
	for (i = 1; i < High - 1; i++) {
		for (j = 1; j < Width - 1; j++) {
			if (canvas[i][j] > 0) {
				canvas[i][j]++;
			}
		}
	}
	int oldTail_i, oldTail_j, oldHead_i, oldHead_j;
	int max = 0;
	for (i = 1; i < High - 1; i++) {
		for (j = 1; j < Width - 1; j++) {
			if (max < canvas[i][j]) {
				max = canvas[i][j];
				oldTail_i = i;
				oldTail_j = j;
			}
			if (canvas[i][j] == 2) {
				oldHead_i = i;
				oldHead_j = j;
			}
		}
	}
	int newHead_i, newHead_j;
	int flag = 0;
	if (moveDirection == 1) {
		newHead_i = oldHead_i - 1;
		newHead_j = oldHead_j;
		flag = 1;
	}
	if (moveDirection == 2) {
		newHead_i = oldHead_i + 1;
		newHead_j = oldHead_j;
		flag = 1;
	}
	if (moveDirection == 3) {
		newHead_i = oldHead_i;
		newHead_j = oldHead_j - 1;
		flag = 1;
	}
	if (moveDirection == 4) {
		newHead_i = oldHead_i;
		newHead_j = oldHead_j + 1;
		flag = 1;
	}
	if (canvas[newHead_i][newHead_j] == -2) {
		canvas[food_x][food_y] = 0;
		food_x = rand() % (High - 5) + 2;
		food_y = rand() % (Width - 5) + 2;
		canvas[food_x][food_y] = -2;
	}
	else {
		canvas[oldTail_i][oldTail_j] = 0;
	}
	if (canvas[newHead_i][newHead_j] > 0 || canvas[newHead_i][newHead_j] == -1) {
		printf("Game Over!");
		Sleep(2000);
		system("pause");
		exit(0);
	}
	else
		canvas[newHead_i][newHead_j] = 1;
}

void startup() {
	int i, j;
	for (i = 0; i < High; i++) {
		canvas[i][0] = -1;
		canvas[i][Width - 1] = -1;
	}
	for (j = 0; j < Width; j++) {
		canvas[0][j] = -1;
		canvas[High - 1][j] = -1;
	}
	canvas[High / 2][Width / 2] = 1;
	for (i = 1; i <= 4; i++) {
		canvas[High / 2][Width / 2 - i] = i + 1;
	}
	moveDirection = 4;
	food_x = rand() % (High - 5) + 2;
	food_y = rand() % (Width - 5) + 2;
	canvas[food_x][food_y] = -2;
}

void show() {
	gotoxy(0, 0);
	int i, j;
	for (i = 0; i < High; i++) {
		for (j = 0; j < Width; j++) {
			if (canvas[i][j] == -1) {
				printf("#");
			}
			else if (canvas[i][j] == 0) {
				printf(" ");
			}
			else if (canvas[i][j] == 1) {
				printf("@");
			}
			else if (canvas[i][j] == -2) {
				printf("O");
			}
			else if (canvas[i][j] > 1) {
				printf("*");
			}
		}
		printf("\n");
	}
	Sleep(100);
}
void updateWithoutInput() {
	move();
}
void updateWithInput() {
	char input;
	if (_kbhit()) {
		input = _getch();
		if (input == 'a') {
			if(moveDirection != 4)moveDirection = 3;
			move();
		}
		else if (input == 'd') {
			if(moveDirection != 3)moveDirection = 4;
			move();
		}
		else if (input == 'w') {
			if(moveDirection != 2)moveDirection = 1;
			move();
		}
		else if (input == 's') {
			if(moveDirection != 1)moveDirection = 2;
			move();
		}
	}
}
int main() {
	HideCursor();
	startup();
	while (1) {
		show();
		updateWithoutInput();
		updateWithInput();
	}
	return 0;
}