save project

diy2.py

+a = 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 name != username:
-        print("账号不存在")
-        continue
-    if password != userpassword:
-        print("密码错误")
-print("欢迎来到贝尔编程!")
+    if a>=1:        
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        a = a-1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            print("欢迎来到贝尔编程!")
+            break
+        if name != username:
+            print("账号不存在")
+            continue
\ No newline at end of file
+        print("还有"+str(a)+"次机会")
+        if password != userpassword:
+            print("密码错误")
+            print("还有"+str(a)+"次机会")
\ No newline at end of file