写的贪吃蛇代码无法控制贪吃蛇上下左右移动,求更正方式
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<windows.h>
#define High 20
#define Width 30
//值0：空格；值1：蛇头；值大于1：蛇身；值-1：边框；值-2：食物
//全局变量
char moveDirection;
int food_x, food_y;
int canvas[High][Width] = { 0 };
int isFailure = 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(void)
{
CONSOLE_CURSOR_INFO cursor_info = { 1,0 };
SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cursor_info);
}
void moveSnake() {
int i, j;
int max = 0;
int oldTail_i, oldTail_j, oldHead_i, oldHead_j;
int newHead_i, newHead_j;
for (i = 1; i < High - 1; i++)
for (j = 1; j < Width - 1; j++)
if (canvas[i][j] > 0)
canvas[i][j]++;
for (i = 1; i < High - 1; i++)
for (j = 1; j < Width - 1; j++)
if (canvas[i][j] > 0)
{
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;
}
}
canvas[oldTail_i][oldTail_j] = 0;
if (moveDirection == 'A') {
newHead_j = oldHead_j - 1;
newHead_i = oldHead_i;
}
else if (moveDirection == 'B') {
newHead_j = oldHead_j + 1;
newHead_i = oldHead_i;
}
else if (moveDirection == 'C') {
newHead_i = oldHead_i - 1;
newHead_j = oldHead_j;
}
else if (moveDirection == 'D') {
newHead_i = oldHead_i + 1;
newHead_j = oldHead_j;
}
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("游戏失败\n");
system("pause");
exit(0);
}
else
canvas[newHead_i][newHead_j] = 1;
Sleep(200);
}
void start() {
int i=0, j=0;
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+i] = 1;//蛇头
for (int i = 1; i <= 4; i++) {
canvas[High / 2][Width / 2] = i + 1;
}//蛇身
moveDirection = 'D';
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] ==0)
printf( " ");
else if (canvas[i][j] == 1)
printf ("@");
else if (canvas[i][j] > 1)
printf("*");
else if (canvas[i][j] == -1)
printf("#");
else if (canvas[i][j] == -2)
printf( "F");
}
printf("\n");
}
}
void updateWithoutInput() {
moveSnake();
}
void updateWithInput() {
if (_kbhit())
{
char input = _getch();
if (input == 'A' || input == 'S' || input == 'D' || input == 'W')
{
moveDirection = input;
moveSnake();
}
}
}
int main() {
start();
while (1) {
show();
HideCursor();
updateWithInput();
updateWithoutInput();
}
return 0;
}
