diff --git a/Untitled6.c b/Untitled6.c
index d640480..de944fc 100644
--- a/Untitled6.c
+++ b/Untitled6.c
@@ -78,6 +78,8 @@ void teacher_login()//
 			printf("输入错误\n");
 			printf("请按任意进行\n");
 			getchar();
+			getchar();
+			system("CLS");
 		}
 		else if(e==4)
 		out ();
@@ -114,6 +116,7 @@ void student_login()//学
 		    printf("请按任意键进行\n");
 		    getchar();
 		    getchar();
+		    system("CLS");
 	    }
 	    if(w==4)
 	    exit(0);
diff --git a/Untitled6.exe b/Untitled6.exe
index 5b831d4..8881f4e 100644
Binary files a/Untitled6.exe and b/Untitled6.exe differ
diff --git a/course.txt b/course.txt
index d28bbda..a652a7f 100644
Binary files a/course.txt and b/course.txt differ