From 5acb5136d2354c7de5480063ec2e8ee9047443f0 Mon Sep 17 00:00:00 2001
From: p5fohke9s <837368911@qq.com>
Date: Thu, 7 Nov 2024 23:15:10 +0800
Subject: [PATCH] ADD file via upload

---
 f2.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 f2.c

diff --git a/f2.c b/f2.c
new file mode 100644
index 0000000..064b7a4
--- /dev/null
+++ b/f2.c
@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+int used[10];
+
+void row(int row[]){
+    int nums[3];
+    int numcount=0;
+    while(numcount < 3){
+        int num=rand()%9+1;
+        if(!used[num]){
+            nums[numcount++]=num; 
+            used[num]=1;
+        }
+    }
+    int i; 
+    for ( i=0;i < 3; i++) {
+        int index;
+        do{
+            index=rand()%9;
+    		}while(row[index] != 0);
+    row[index]=nums[i];
+    }
+}
+int main(){
+	int i,j;
+    int a[10][10];
+    srand((unsigned)time(NULL));
+    for ( i = 0; i < 9; i++){
+        for( j=0; j < 9; j++){
+            a[i][j]=0;
+        }
+				if(i % 3 == 0) 
+					memset(used, 0, sizeof(used)); 
+        row(a[i]);
+    }
+   
+    for(i=0;i < 9;i++){
+        for( j=0;j < 9;j++) {
+            printf("%d ",a[i][j]);
+            
+        }
+       printf("\n"); 
+    }
+    return 0;
+}