save project

a.py

 a="abc"
 a="abc"
 b="123"
 b="123"
-c=input("名字:")
-d=input("密码:")
-if a==c and b==d:
+
+while True:
+    c=input("名字:")
+    d=input("密码:")
+    
+    if a==c and b==d:
         print("正常")
         print("正常")
-else:
+        break
+    else:      
         print("错误")         
         print("错误")         
+print("欢迎登录")     
\ No newline at end of file