save project

yajz.py

+i=3
+bb="python"
+aa="123"
+while True :
+    if i>0
+        BB=input("请输入用户名")
+        AA=input("请输入密码")
+        i-=1
+        if bb==BB and aa==AA:
+            print("登录成功")
+            break
+        if BB!=bb:
+            print("用户名错误")
+            continue
+        if AA!=aa:
+            print("用户名错误")
+            continue
+    else:
+        print("账号锁定")
+        exit()     
+print("welcome 贝尔编程")       
\ No newline at end of file