diff --git a/first.c b/first.c
new file mode 100644
index 0000000..0ae1bcc
--- /dev/null
+++ b/first.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+void printSudoku(char board[9][9]) {
+    for (int i = 0; i < 9; i++) {
+        for (int j = 0; j < 9; j++) {
+            // 每个3x3小方格之间添加分隔符
+            if (j % 3 == 0 && j != 0) {
+                printf("| ");
+            }
+            printf("%c ", board[i][j]);
+        }
+        printf("\n");
+        // 每个3行之间添加分隔符
+        if ((i + 1) % 3 == 0 && i != 8) {
+            printf("---------------------\n");
+        }
+    }
+}
+
+int main() {
+    char board[9][9] = {
+        {'5','3','4','6','7','8','9','1','2'},
+        {'6','7','2','1','9','5','3','4','8'},
+        {'1','9','8','3','4','2','5','6','7'},
+        {'8','5','9','7','6','1','4','2','3'},
+        {'4','2','6','8','5','3','7','9','1'},
+        {'7','1','3','9','2','4','8','5','6'},
+        {'9','6','1','5','3','7','2','8','4'},
+        {'2','8','7','4','1','9','6','3','5'},
+        {'3','4','5','2','8','6','1','7','9'}
+    };
+
+    printSudoku(board);
+    return 0;
+}
+