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