save project

diy2.py

-i=3
 username = "python"
 userpassword = "123456"
 while True:
-    if i>0:
-        name = input("请输入用户名:")
-        if name!=username:
-            print("用户名错")
-            i=i-1
-            continue
-        password = input("请输入密码:")
-        if password!=userpassword:
-            print("密码错误")
-            i=-1
-            continue
-        if name == username and password == userpassword:
-            print("登录成功!")
-            break
-        else:
-            print("用户名密码错误重输")
-            i=i-1
-    print("限制")
-    exit()
+    name = input("请输入用户名:")
+    if name!=username:
+        print("用户名错")
+        continue
+    password = input("请输入密码:")
+    if password!=userpassword:
+        print("密码错误")
+        continue
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break
+    print("用户名密码错误重输")
 print("欢迎")
\ No newline at end of file