save project

diy2.py

 username = "q"
 username = "q"
 userpassword = "1"
 userpassword = "1"
+i=3
 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
-    elif  name !=username:
-        print("账号错误")
-        
-    elif  password!=userpassword:
-        print("密码错误") 
-    
+    if i > 0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        elif  name !=username:
+            print("账号错误")       
+        elif  password!=userpassword:
+            print("密码错误")
+    else:
+        print("三次机会已用完")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file