diff --git a/作业2.c b/作业2.c
new file mode 100644
index 0000000..0f82a6c
--- /dev/null
+++ b/作业2.c
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <time.h>
+
+void generateMatrix(int matrix[9][9]) {
+    srand(time(0)); // ʹÓõ±Ç°Ê±¼ä×÷ΪËæ»úÊýÖÖ×Ó
+
+    // ³õʼ»¯¾ØÕó
+    int i,j; 
+    for (i = 0; i < 9; i++) {
+        for (j = 0; j < 9; j++) {
+            matrix[i][j] = 0;
+        }
+    }
+
+    // Éú³ÉÿÐеÄÊý×Ö
+    int row;
+    for (row = 0; row < 9; row++) {
+        // Éú³É1-9µÄËæ»úÅÅÁÐ
+        int nums[9] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
+        for (i = 0; i < 9; i++) {
+            int j = rand() % (i + 1);
+            int temp = nums[i];
+            nums[i] = nums[j];
+            nums[j] = temp;
+        }
+
+        // ½«Ç°Èý¸öËæ»úÊý·ÅÈë¾ØÕó
+        for ( i = 0; i < 3; i++) {
+            matrix[row][i] = nums[i];
+        }
+    }
+
+    // ´òÂÒÿÐеÄ˳Ðò
+    for (row = 0; row < 9; row++) {
+        for ( i = 0; i < 9; i++) {
+            int j = rand() % 9;
+            int temp = matrix[row][i];
+            matrix[row][i] = matrix[row][j];
+            matrix[row][j] = temp;
+        }
+    }
+}
+
+void printMatrix(int matrix[9][9]) {int i,j;
+    for (i = 0; i < 9; i++) {
+        for (j = 0; j < 9; j++) {
+            printf("%d ", matrix[i][j]);
+        }
+        printf("\n");
+    }
+}
+
+int main() {
+    int matrix[9][9];
+
+    generateMatrix(matrix);
+    printMatrix(matrix);
+
+    return 0;
+}