save project

diy5.py

+i=3
+username="python"
+userpassword="123456"
+while True:
+    if i>0:
+        i-=1
+        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("用户名错误，重新输入")
+            continue
+        else:
+            print("密码错误，重新输入")
+    else:
+        print("次数已达上限")
+        exit()
+print("欢迎你")
\ No newline at end of file