diff --git a/2.cpp b/2.cpp
new file mode 100644
index 0000000..643fdc0
--- /dev/null
+++ b/2.cpp
@@ -0,0 +1,55 @@
+#include<stdio.h>
+#include<time.h>
+#include<stdlib.h>
+
+void matrixOutput(int matrixArr[9][9])
+{
+  for (int i = 0; i < 9; i++)
+  {
+    for (int j = 0; j < 9; j++)
+    {
+      printf("%d", matrixArr[i][j]);
+      if (j != 8)
+        printf(" ");
+    }
+    if (i != 8)
+      printf("\n");
+  }
+}
+
+void matrixRandomInit(int matrixArr[9][9]){
+  int map[9] = {1,2,3,4,5,6,7,8,9};
+  int mp;
+  srand(time(NULL));
+  for(int i=0;i<9;i++){
+    for(int j=0;j<9;j++){
+      matrixArr[i][j] = 0;
+    }
+  }
+  for(int i=0;i<9;i++){
+    if(i%3==0){
+      mp=0;
+      for(int j=0;j<8;j++){
+        int n = i+rand()%(8-i);
+        int tmp = map[i];
+        map[i] = map[n];
+        map[n]=tmp;
+      }
+    }
+    int k=0;
+    while(k<3){
+      int tmpP = rand()%9;
+      if(matrixArr[i][tmpP]==0){
+        matrixArr[i][tmpP] = map[mp++];
+        k++;
+      }
+    }
+  }
+}
+
+int main(){
+  int board[9][9];
+  matrixRandomInit(board);
+  matrixOutput(board);
+  return 0;
+}