C语言，打开文件，然后关闭，之后再关闭，为什么文件就打不开了，如何恢复文件可以打开的状态呢？代码的思路不会了。
可能资源泄漏了，重启过也是这种情况吗？可以用一个代码判断关闭状态：
#include <stdio.h>
int main() {
FILE *fp;
fp = fopen("test.txt", "r");
if(fp == NULL) {
printf("无法打开\n");
return 1;
}
fclose(fp);
return 0;
}
在C语言中，打开文件后需要及时关闭文件，否则可能会导致文件句柄被占用，无法再次打开文件。如果文件无法打开，可以尝试以下方法恢复文件状态：
重启计算机，有时候文件句柄会被释放。
确认文件是否被其他程序占用，如果是，关闭占用程序。
检查文件是否已被删除或移动到其他位置。
如果文件仍无法打开，可以尝试使用文件恢复软件进行恢复。
注意：在操作文件时，应该遵循良好的文件处理习惯，及时关闭文件，避免文件损坏或丢失。
不知道你这个问题是否已经解决, 如果还没有解决的话:**
snake.c
#include <curses.h>
#include <stdlib.h>
#include <pthread.h>
#include "LIST.h"
#define MAP_WIDTH 20
#define MAP_HEIGHT 20
extern struct Snake *g_snake;
extern struct Snake g_food;
int g_flag = 0;
int g_direction = KEY_RIGHT;
int commitsuicide() {
struct Snake *p;
p = g_snake;
struct Snake *tmp;
tmp = g_snake->next;
while (tmp != NULL) {
if ((p->x == tmp->x) && (p->y == tmp->y)) {
return 0;
}
tmp = tmp->next;
}
return -1;
}
void initFood() {
int judge = 0;
do {
int x = rand() % 20 + 1;
int y = rand() % 20 + 1;
g_food.x = x;
g_food.y = y;
g_food.next = NULL;
if ((g_food.x == g_snake->x) && (g_food.y == g_snake->y)) {
judge = 1;
}
} while (g_food.x == 0 || g_food.x > 18 || g_food.y == 0 || g_food.y > 18 ||
judge == 1);
}
int foodFind(int x, int y) {
if ((g_food.x == x) && (g_food.y == y)) {
return 0;
}
return -1;
}
int headTofood() {
if ((g_food.x == g_snake->x) && (g_food.y == g_snake->y)) {
return 0;
}
return -1;
}
void initMap() {
int x;
int y;
for (x = 0; x < MAP_WIDTH; x++) {
for (y = 0; y < MAP_HEIGHT; y++) {
if (x == 0 || x == MAP_HEIGHT - 1) {
if (x == 0) {
printw("* ");
} else {
printw("* ");
}
} else {
if (y == 0 || y == MAP_WIDTH - 1) {
printw("* ");
} else {
if ((snakeFind(g_snake, x, y) == 0)) {
printw("[]");
} else if (foodFind(x, y) == 0) {
printw("++");
} else {
printw(" ");
}
}
}
}
printw("\n");
}
}
void handleKey() {
int key;
noecho();
keypad(stdscr, TRUE);
while (1) {
key = getch();
if (adjustDirection(key) == 0) {
continue;
}
}
}
int adjustDirection(int key) {
if (key == KEY_DOWN || key == KEY_UP || key == KEY_RIGHT ||
key == KEY_LEFT) {
if (((g_direction == KEY_RIGHT) && (key == KEY_LEFT)) ||
((g_direction == KEY_LEFT) && (key == KEY_RIGHT)) ||
((g_direction == KEY_UP) && (key == KEY_DOWN)) ||
((g_direction == KEY_DOWN) && (key == KEY_UP))) {
return 0;
}
}
g_direction = key;
return -1;
}
void moveSnakeauto() {
while (1) {
switch (g_direction) {
case KEY_DOWN:
if (headTofood() == 0) {
insertSnake(&g_snake, g_snake->x + 1, g_snake->y);
g_flag = -1;
} else {
insertSnake(&g_snake, g_snake->x + 1, g_snake->y);
deleteSnake(&g_snake);
}
break;
case KEY_UP:
if (headTofood() == 0) {
insertSnake(&g_snake, g_snake->x - 1, g_snake->y);
g_flag = -1;
} else {
insertSnake(&g_snake, g_snake->x - 1, g_snake->y);
deleteSnake(&g_snake);
}
break;
case KEY_LEFT:
if (headTofood() == 0) {
insertSnake(&g_snake, g_snake->x, g_snake->y - 1);
g_flag = -1;
} else {
insertSnake(&g_snake, g_snake->x, g_snake->y - 1);
deleteSnake(&g_snake);
}
break;
case KEY_RIGHT:
if (headTofood() == 0) {
insertSnake(&g_snake, g_snake->x, g_snake->y + 1);
g_flag = -1;
} else {
insertSnake(&g_snake, g_snake->x, g_snake->y + 1);
deleteSnake(&g_snake);
}
break;
default:
break;
}
clear();
if (g_flag == -1) {
initFood();
g_flag = 0;
}
if (snakeDie() == 0 || commitsuicide() == 0) {
destorySnake();
createSnake();
}
initMap();
refresh();
usleep(100000);
}
}
int main() {
pthread_t t_movesnake;
pthread_t t_getinput;
initscr();
createSnake();
initFood();
initMap();
pthread_create(&t_movesnake, NULL, (void *)moveSnakeauto, NULL);
pthread_create(&t_getinput, NULL, (void *)handleKey, NULL);
while (1);
endwin();
return 0;
}
list.c
#include <curses.h>
#include <stdlib.h>
#include "LIST.h"
struct Snake *g_snake;
struct Snake g_food;
int snakeDie() // panduansiwang
{
if (g_snake->x == 0 || g_snake->x == 19 || g_snake->y == 0 ||
g_snake->y == 19) {
return 0;
}
return -1;
}
void destorySnake() // bianlishanchu
{
struct Snake *p;
while (g_snake != NULL) {
p = g_snake;
g_snake = g_snake->next;
free(p);
}
}
void insertSnake(struct Snake **head, int x, int y) // touchafa
{
struct Snake *node;
node = (struct Snake *)malloc(sizeof(struct Snake));
node->x = x;
node->y = y;
node->next = NULL;
node->next = *head;
*head = node;
}
void createSnake() {//chushihuashe
g_snake = (struct Snake *)malloc(sizeof(struct Snake));
g_snake->x = 3;
g_snake->y = 3;
g_snake->next = NULL;
insertSnake(&(g_snake), 3, 4);
insertSnake(&(g_snake), 3, 5);
insertSnake(&(g_snake), 3, 6);
}
int snakeFind(struct Snake *head, int x, int y) {//bianlipanduan
struct Snake *p;
p = head;
while (p != NULL) {
if ((p->x == x) && (p->y == y)) {
return 0;
}
p = p->next;
}
return -1;
}
void deleteSnake(struct Snake **head) {//shanchuweiba
struct Snake *p;
struct Snake *tmp;
tmp = NULL;
p = *head;
while ((p != NULL) && (p->next != NULL)) {
if ((p->next->next == NULL)) {
tmp = p->next;
p->next = NULL;
free(tmp);
break;
}
p = p->next;
}
}
list.h
#ifndef _LIST_H_
#define _LIST_H_
struct Snake
{
int x;
int y;
struct Snake *next;
};
void insertSnake(struct Snake **head,int x,int y);
void createSnake();
int snakeFind(struct Snake *head,int x,int y);
void deleteSnake(struct Snake **head);
int foodFind(int x,int y);
int snakeDie();
void destorySnake();
#endif
Makefile
snake:
gcc snake_final.c LIST.c -lncurses -lpthread -o snakepro