diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b89fb86
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+*.*~
+*.out
+tags
diff --git a/A8code.c b/A8code.c
index d860be6..870ba00 100755
--- a/A8code.c
+++ b/A8code.c
@@ -16,25 +16,37 @@ Node* createNode(int puzzle[N][N]) {
     Node* newnode = (Node*)malloc(sizeof(Node));
     //请实现该函数
 
-    
-
+    for(int i = 0; i < N; i++){
+      for(int j = 0; j < N; j++){
+        newnode.puzzle[i][j] = puzzle[i][j];
+      }
+    }
+    newnode.parent = NULL;
+    newnode.f = 0;
+    newnode.g = 0;
+    newnode.h = 0;
 }
 
 // 检查两个拼图状态是否相同
 bool isSamePuzzle(int a[N][N], int b[N][N]) {
     //相同则返回true,否则返回false
-
-
-
+    for(int i = 0; i < N; i++){
+      for(int j = 0; j < N; j++){
+        if(a[i][j] != b[i][j]) return false;
+      }
+    }
+    return true;
 }
 
 // 打印拼图状态
 void printPuzzle(int puzzle[N][N]) {
     //双重for循环实现拼图的打印
-
-
-
-    printf("\n");
+    for(int i = 0; i < N; i++){
+      for(int j = 0; j < N; j++){
+        printf("%d ",puzzle[i][j]);
+      }
+      printf("\n")
+    }
 }
 
 
@@ -43,7 +55,12 @@ int heuristic(Node* current, Node* goal) {
     int h = 0;
     // 计算不匹配的拼图块数量
 
-
+    for(int i = 0; i < N; i++){
+      for(int j = 0; j < N; j++){
+        if(current.puzzle[i][j] != goal.puzzle[i][j]) h++;
+      }
+    }
+    return h;
 }
 
 // 移动操作，生成新的拼图状态