diff --git a/sudoku1.c b/sudoku1.c
new file mode 100644
index 0000000..9aa2b97
--- /dev/null
+++ b/sudoku1.c
@@ -0,0 +1,34 @@
+/*-------------------*/
+/*实验：数独矩阵------*/
+/*1.9×9 数组格式化输出；*/
+/*-------------------*/
+#include<stdio.h>
+#include<stdlib.h>
+void printBoad(int _board[9][9]){
+    for (int i = 0; i < 9;i++){
+        if(!(i%3))printf("|-----------------------|\n");
+        for (int j = 0; j < 9;j++){
+            if(!(j%3))
+                printf("| ");
+            if(_board[i][j]==0)
+                printf(". ");
+            else 
+                printf("%d ", _board[i][j]);
+        }
+        printf("|\n");
+    }
+    printf("|-----------------------|\n");
+}
+int main(){
+    randseedInit();
+    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}};
+    printBoad(board);
+}
\ No newline at end of file