save project

biy.py

+username="a"
+userpassword="1"
+i=3
+while True:
+    if i>0:
+        name=input("输入用户名")
+        password=input("输入密码")
+        i-=1
+        if name==username and password==userpassword:
+            print("成功")
+            break
+        if name != username:
+            print("用户名错误")
+            print("还有"+str(i)+"次机会")
+            continue
+        if password != userpassword:
+            print("密码错误")
+            print("还有"+str(i)+"次机会")
+    else:
+        print("锁定")
+        exit()
+print("欢迎登录")
\ No newline at end of file