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program2.c

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+#include<stdio.h>
+#include <stdlib.h>
+#include <time.h>
+void shuffleArray(int array[], int length) 
+{
+    srand(time(NULL));
+    for (int i = length - 1; i > 0; i--) 
+	{
+        int j = rand() % (i + 1);
+        int temp = array[i];
+        array[i] = array[j];
+        array[j] = temp;
+    }
+}
+void output(int arry[9][9])
+{
+	int i,j;
+	printf("|-----------------------|\n");	
+	for(i=0;i<9;i++)
+	{
+		for(j=0;j<9;j++)
+		{
+			if(j==0)
+				printf("| ");
+			printf("%d ",arry[i][j]);
+			if((j+1)%3==0)
+			{
+				printf("| ");	
+			}
+		}
+		printf("\n");
+		if((i+1)%3==0)
+		{
+			printf("|-----------------------|\n");
+			
+		}
+		     
+   }				 
+}
+int main()
+{
+	void output(int arry[9][9]);
+	srand(time(NULL));
+	int array[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
+    int length = sizeof(array) / sizeof(array[0]);
+    shuffleArray(array, length);
+	int board[9][9]={0},number=0;
+	for(int row=0;row<9;row++)
+	{
+		int k=1;
+		while(k<4)
+		{
+			int col=rand()%9;
+			if(board[row][col]==0)
+			{
+			    board[row][col]=array[number];
+			    number++;
+			    k++;
+			}
+		}
+		if((row+1)%3==0)
+		{
+			number=0;
+			shuffleArray(array, length);
+		}
+	}
+	output(board);
+}
+