diff --git a/t1.c b/t1.c
new file mode 100644
index 0000000..390f272
--- /dev/null
+++ b/t1.c
@@ -0,0 +1,41 @@
+#include <stdio.h>
+int 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}};
+void f1()
+{
+    printf("|");
+    for (int i = 0; i < 23; i++)
+    {
+        printf("-");
+    }
+    printf("|\n");
+}
+int main()
+{
+    printf("格式化后的数组：\n");
+    for (int i = 0; i < 9; i++)
+    {
+        if (i % 3 == 0)
+        {
+            f1();
+        }
+        printf("| ");
+        for (int j = 0; j < 9; j++)
+        {
+            if (j % 3 == 0 && j)
+            {
+                printf("| ");
+            }
+            printf("%d ", board[i][j]);
+        }
+        printf("|\n");
+    }
+    f1();
+}
\ No newline at end of file