save project

diy2.py

+i = 3
 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
-    if username != name:
-       print("用户名错误")
-    continue
-    if userpassword != name:
-        print("密码错误")
+    if i > 0 :
+        i-=1
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if username != name:
+            print("用户名错误")
+            continue
+        if userpassword != name:
+            print("密码错误")
+            print("sb还剩"str(i) + "次机会")
+    else :
+        print ("输入错误次数过多！")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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