diff --git a/A8code-修改版.c b/A8code-修改版.c
new file mode 100644
index 0000000..2257d99
--- /dev/null
+++ b/A8code-修改版.c
@@ -0,0 +1,255 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+
+#define N 3  // ¶¨ÒåƴͼµÄά¶È£¬ÕâÊÇÒ»¸ö3x3µÄƴͼ
+
+typedef struct Node {
+    int puzzle[N][N];  // ´æ´¢Æ´Í¼×´Ì¬µÄÊý×é
+    struct Node* parent;  // Ö¸Ïò¸¸½ÚµãµÄÖ¸Õ룬ÓÃÓÚ×·×Ù·¾¶
+    int f, g, h;  // A*Ëã·¨ÖÐµÄ f, g, h Öµ
+} Node;
+
+// ´´½¨ÐµÄƴͼ½Úµã
+Node* createNode(int puzzle[N][N]) {
+	int i,j;
+    Node* newnode = (Node*)malloc(sizeof(Node));
+    //ÇëʵÏָú¯Êý
+    for ( i = 0; i < N;i++)
+        for ( j = 0; j < N;j++){
+            newnode->puzzle[i][j] = puzzle[i][j];
+        }
+    newnode->parent = NULL;
+    newnode->f = 0;
+    newnode->g = 0;
+    newnode->h = 0;
+    return newnode;
+}
+
+// ¼ì²éÁ½¸öƴͼ״̬ÊÇ·ñÏàͬ
+bool isSamePuzzle(int a[N][N], int b[N][N]) {
+    //ÏàͬÔò·µ»Øtrue,·ñÔò·µ»Øfalse
+    int i,j;
+    for ( i = 0; i < N;i++)
+        for ( j = 0; j < N;j++)
+            if (a[i][j]!=b[i][j])
+                return false;
+    return true;
+}
+
+// ´òӡƴͼ״̬
+void printPuzzle(int puzzle[N][N]) {
+    //Ë«ÖØforÑ­»·ÊµÏÖƴͼµÄ´òÓ¡
+    int i,j;
+    for ( i = 0; i < N;i++){
+        for ( j = 0; j < N;j++)
+            if(puzzle[i][j])printf("%d ", puzzle[i][j]);
+            else printf("  ");
+        putchar('\n');
+    }
+    printf("\n");
+}
+
+
+// Æô·¢º¯Êý£¬¼ÆË㵱ǰ״̬µ½Ä¿±ê״̬µÄ¹À¼Æ´ú¼Û
+int heuristic(Node* current, Node* goal) { 
+    int h = 0;
+    // ¼ÆË㲻ƥÅäµÄƴͼ¿éÊýÁ¿
+    int i,j;
+    for ( i = 0; i < N;i++)
+        for ( j = 0; j < N;j++)
+            if(current->puzzle[i][j]!=goal->puzzle[i][j])
+                h++;
+    return h;
+}
+
+// Òƶ¯²Ù×÷£¬Éú³ÉеÄƴͼ״̬
+Node* move(Node* current, int dir) {
+    int key_x, key_y;//¼Ç¼¿Õ°×¿éµÄλÖÃ
+    // ÕÒµ½¿Õ°×¿éµÄλÖÃ
+    int i,j;
+    for ( i = 0; i < N;i++)
+        for ( j = 0; j < N;j++)
+            if(!current->puzzle[i][j]){
+                key_x = i;
+                key_y = j;
+            }
+    //¸ønew_x¡¢new_y¸³Öµ
+    int new_x = key_x;
+    int new_y = key_y;
+    switch (dir){
+    case 0:
+        new_x--;
+        break;
+    case 1:
+        new_x++;
+        break;
+    case 2:
+        new_y--;
+        break;
+    case 3:
+        new_y++;
+        break;
+    default:
+        break;
+    }
+    // ¸ù¾ÝÒƶ¯·½Ïò¸üÐÂпéµÄλÖã¬ÉÏÏÂ×óÓÒÒƶ¯
+    if(new_x>=3||new_x<0||new_y>=3||new_y<0)
+        return NULL;
+    // ¼ì²éÐÂλÖÃÊÇ·ñÔڱ߽çÄÚ
+    // ´´½¨Ð½ڵ㣬¸´ÖƵ±Ç°Æ´Í¼×´Ì¬£¬²¢½»»»¿éµÄλÖÃ
+    Node* new_node = createNode(current->puzzle);
+    new_node->puzzle[key_x][key_y] = current->puzzle[new_x][new_y];
+    new_node->puzzle[new_x][new_y] = 0;
+    return new_node;
+}
+
+// A*Ëã·¨£¬Ñ°ÕÒ×î¶Ì·¾¶
+Node* AStar(Node* start, Node* goal) {
+    Node* OPEN[1000];  // ¿ª·ÅÁÐ±í£¬ÓÃÓÚ´æ´¢´ý̽Ë÷µÄ½Úµã
+    Node* CLOSED[1000];  // ¹Ø±ÕÁÐ±í£¬ÓÃÓÚ´æ´¢ÒÑ̽Ë÷µÄ½Úµã
+    int OPEN_SIZE = 0;  // ¿ª·ÅÁбíµÄ´óС
+    int CLOSED_SIZE = 0;  // ¹Ø±ÕÁбíµÄ´óС
+
+    OPEN[0] = start;  // ½«Æðʼ½ÚµãÌí¼Óµ½¿ª·ÅÁбí
+    OPEN_SIZE = 1;  // ¿ª·ÅÁбíµÄ´óСÉèÖÃΪ1
+    CLOSED_SIZE = 0;  // ¹Ø±ÕÁбíµÄ´óСÉèÖÃΪ0
+
+    while (OPEN_SIZE > 0) {//¶ÔopenÁбí½øÐвÙ×÷
+        int min_f = OPEN[0]->f;//³õʼ»¯×îСµÄf
+        int min_index = 0;
+        // ²éÕÒ¿ª·ÅÁбíÖоßÓÐ×îСfÖµµÄ½Úµã
+        int i,j,dir;
+        for ( i = 0; i < OPEN_SIZE;i++){
+            if(OPEN[i]->f<min_f){
+                min_f = OPEN[i]->f;
+                min_index = i;
+            }
+        }
+        Node *current = OPEN[min_index]; // »ñÈ¡¾ßÓÐ×îСfÖµµÄ½Úµã
+        if(isSamePuzzle(current->puzzle,goal->puzzle))
+            return current;
+        // Èç¹ûµ±Ç°½ÚµãÓëÄ¿±ê״̬ƥÅ䣬±íʾÕÒµ½½â
+        OPEN_SIZE--;
+        //¿ª·ÅÁбíµÄ´óС¼õ1£¬±íʾ´Ó¿ª·ÅÁбíÖÐÒƳýÁËÒ»¸ö½Úµã
+        
+        //½«×îС f ÖµµÄ½ÚµãÒƵ½¿ª·ÅÁбíµÄĩ⣬ÒÔ±ãÉÔºó½«ÆäÌí¼Óµ½¹Ø±ÕÁбíÖС£
+        //ÕâÊÇΪÁËÓÅ»¯¿ª·ÅÁбíµÄ½á¹¹¡£
+        Node* temp = OPEN[min_index];
+        OPEN[min_index] = OPEN[OPEN_SIZE];
+        OPEN[OPEN_SIZE] = temp;
+        CLOSED[CLOSED_SIZE] = current;
+        CLOSED_SIZE++;
+        //½«µ±Ç°½ÚµãÌí¼Óµ½¹Ø±ÕÁÐ±í£¬¹Ø±ÕÁбí´óС¼Ó1
+        int key = 0;
+        
+        // ²éÕÒµ±Ç°½ÚµãÖпհ׿éµÄλÖÃ
+        for (i = 0; i < N; i++) {
+            for ( j = 0; j < N; j++) {
+                if (current->puzzle[i][j] == 0) {
+                    key = i * N + j;
+                    break;
+                }
+            }
+        }
+
+        // ³¢ÊÔËĸö·½ÏòµÄÒƶ¯²Ù×÷
+        for ( dir = 0; dir < 4; dir++) {
+            Node* new_node = move(current, dir);
+
+            if (new_node != NULL && !isSamePuzzle(new_node->puzzle, current->puzzle)) {
+                //µÃµ½¶ÔÓ¦µÄg¡¢f¡¢hÖµ
+                int gNew = current->g + 1;
+                int hNew = heuristic(new_node, goal);
+                int fNew = gNew + hNew;
+
+                bool in_OPEN = false;
+                int open_index = -1;
+                // ¼ì²éнڵãÊÇ·ñÔÚ¿ª·ÅÁбíÖÐ
+                for (i = 0; i < OPEN_SIZE; i++) {
+                    if (isSamePuzzle(new_node->puzzle, OPEN[i]->puzzle)) {
+                        in_OPEN = true;
+                        open_index = i;
+                        break;
+                    }
+                }
+
+                bool in_CLOSED = false;
+                int closed_index = -1;
+                for (i = 0; i < CLOSED_SIZE; i++) {
+                    if (isSamePuzzle(new_node->puzzle, CLOSED[i]->puzzle)) {
+                        in_CLOSED = true;
+                        closed_index = i;
+                        break;
+                    }
+                }
+                // ¼ì²éнڵãÊÇ·ñÔڹرÕÁбíÖÐ
+                //Èô¸Ã½Úµã»ú²»ÔÚ¿ª·ÅÁбíÖÐÒ²²»ÔڹرÕÁбíÖÐ
+                if (!in_OPEN && !in_CLOSED) {
+                    new_node->f = fNew;
+                    new_node->g = gNew;
+                    new_node->h = hNew;
+                    new_node->parent = current;
+                    //°ÑgNew¡¢hNew¡¢fNew¸³¸ønew_nod¶ÔÓ¦µÄg¡¢h¡¢fÖµ£¬²¢½«Æ丸½ÚµãÉèÖÃΪµ±Ç°½Úµã¡£
+                    OPEN[OPEN_SIZE] = new_node;
+                    OPEN_SIZE++;
+                    // Ìí¼Óнڵãnew_nodeµ½¿ª·ÅÁÐ±í£¬¿ª·ÅÁбí´óС¼Ó1
+
+                } 
+                //Èç¹ûнڵãÒѾ­ÔÚ¿ª·ÅÁбíÖУ¬µ«Ð嵀 f Öµ¸üС£¬½«¸üпª·ÅÁбíÖÐÒÑ´æÔÚ½ÚµãµÄÐÅÏ¢¡£
+                else if (in_OPEN && fNew < OPEN[open_index]->f) {
+                    new_node->f = fNew;
+                    new_node->g = gNew;
+                    new_node->h = hNew;
+                    new_node->parent = current;
+                }
+            }
+        }
+    }
+
+    return NULL;  // ÎÞ½â
+}
+
+// ´òÓ¡½â·¾¶
+void printPath(Node* final) {
+	int i,j;
+    if (final == NULL) {
+        return;
+    }
+    printPath(final->parent);  // µÝ¹é´òӡ·¾¶
+    for (i = 0; i < N; i++) {
+        if (i%3==0){
+            printf("-------\n");
+        }
+        for (j = 0; j < N; j++) {
+            printf("%d ", final->puzzle[i][j]);
+        }
+        
+        printf("\n");
+        
+    }
+}
+
+int main() {
+    //int start[N][N] = {{2, 0, 3}, {1, 8, 4}, {7, 6, 5}};
+    //int target[N][N] = {{1, 2, 3}, {8, 0, 4}, {7, 6, 5}};
+
+    // int start[N][N] = {{2, 8, 3}, {1, 6, 4}, {7, 0, 5}};
+    // int target[N][N] = {{1, 2, 3}, {8, 0, 4}, {7, 6, 5}};
+
+    int start[N][N] = {{2, 8, 3}, {1, 0, 4}, {7, 6, 5}};
+    int target[N][N] = {{1, 2, 3}, {8, 0, 4}, {7, 6, 5}};
+    Node* init = createNode(start);
+    Node* goal = createNode(target);
+
+    Node* final = AStar(init, goal);
+    if (final) {
+        printf("This problem has a solution:\n");
+        printPath(final);  // ´òÓ¡½â·¾¶
+    } else {
+        printf("This problem has no solution£¡\n");
+    }
+
+    return 0;
+}