diff --git a/题目2.cpp b/题目2.cpp
new file mode 100644
index 0000000..308e558
--- /dev/null
+++ b/题目2.cpp
@@ -0,0 +1,44 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<time.h>
+int a[10][10]={0};
+void random()
+{
+	int i=1,j=1,x,y;
+	while(j<=3){
+		i=1;
+	while(i<=9)
+	{
+		x=rand()%3;
+		y=rand()%9;
+		if(a[x+1+(j-1)*3][y+1]==0)
+		{
+			a[x+1+(j-1)*3][y+1]=i;i++;
+		}
+	}
+	j++;
+    }
+}
+void format(int s[][10])
+{
+    printf("-------------------------\n");
+    for(int i=1;i<10;i++)
+    {
+    	printf("| ");
+        for(int j=1;j<10;j++)
+        {
+        	
+        	printf("%d ",s[i][j]);
+        	if(j%3==0) printf("| ");
+		}
+		printf("\n");
+		if(i%3==0) printf("-------------------------\n");
+    }
+}
+int main()
+{
+	random();
+	format(a);
+	return 0;
+}
+