diff --git a/main.c b/main.c
index eb6fee7..31c70ab 100644
--- a/main.c
+++ b/main.c
@@ -206,6 +206,7 @@ for(i=0;i<all;i++)
 if(student[i].num==num_temp)
 {
 result=1;
+break;
 }
 }
 if(result==1)
@@ -221,10 +222,10 @@ do
 {
 printf("ÊäÈëѧºÅ:");
 scanf("%d",&num_temp);
-if(num_temp<10141301)
+if(num_temp>999999999)
 printf("error!");
 }
-while(num_temp<10140301);
+while(num_temp>99999999);
 if(CheckNumber(num_temp)>0)
 {
 printf("Number repeatly!\n");
@@ -546,4 +547,3 @@ return 0;
 }
 
 
-