save project

diy2.py

+username = "python"
+userpassword = "123456"
+i=3
+while True:
+    if i>0:
+        a = input("请输入用户名:")
+        b = input("请输入密码:")
+        i-=1
+        if a == username and b == userpassword:
+            break
+            print("登录成功!")
+        if a!=username:
+            print("用户名错误!请重新输入")
+            print("还有"+str(i)+"次")
+            continue
+        if b!=userpassword:
+            print("密码错误!请重新输入")
+            print("还有+str(i)+次")
+    else:
+        print("登录锁定")
+        exit()    
+print("欢迎来到贝尔编程!")
\ No newline at end of file