save project

1.py

+i=3
 username = 'python'
 userpassword ='123456'
 while True:
-    name=input('请输入用户名')
-    password=input('请输入密码')
-
-    if username == name and userpassword == password:
-        print('登录成功')
-        break
-    if username != name:
-        print('请重新输入用户名')
-        continue
-    if userpassword != password:
-        print('请重新输入密码')
-print('欢迎')
-
+    if i>0:
+        name=input('请输入用户名')
+        password=input('请输入密码')
+        i-=1
+        if username == name and userpassword == password:
+            print('登录成功')
+            break
+        elif username != name:
+            print('请重新输入用户名')
+        else:
+                print('密码错误，请重新输入')
+    else:
+        print('失败，请重新尝试')
+        exit()
+print(欢迎)