ADD file via upload

2.txt

@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+int main()
+{
+    int a[9][9] = { 0 };
+    int i, j, k;
+    srand(time(NULL));
+
+    printf("|-------------------|\n");
+
+    for (i = 0; i < 9; i++)
+    {
+        for (j = 0; j < 9; j++)
+        {
+            if (j % 3 == 0)
+                printf("|");
+
+            if (rand() % 3 == 0)
+            {
+                do
+                {
+                    k = rand() % 9 + 1;
+                } while (a[i][k - 1] != 0);
+
+                a[i][k - 1] = k;
+                printf("%d", k);
+            }
+            else
+            {
+                a[i][j] = 0;
+                printf(".");
+            }
+
+            if (j == 8)
+                printf("|");
+
+            printf(" ");
+        }
+
+        printf("\n");
+
+        if ((i + 1) % 3 == 0)
+            printf("|-------------------|\n");
+    }
+
+    return 0;
+}