save project

1.py

+a = "py"
+d = "1"
+while True:
+    n = input("请输入用户名:")
+    s = input("请输入密码:")
+    if a == n and d == s:
+        print("登录成功!")
+    if a!=n:
+        print("用户名登录错误!请重新输入？")
+        continue
+        break
+    if d!=s:
+         print("密码登录错误!请重新输入？")
+print("欢迎来到贝尔!")

diy2.py

+sz = "python"
+d = "123456"
+while True:
+    n = input("请输入用户名:")
+    s = input("请输入密码:")
+    if sz == n and d == s:
+        print("登录成功!")
+    if a!=n:
+        print("用户名错误!请重新输入")
+        continue
+    if d!=s:
+        print("用密码错误!请重新输入") 
+print("欢迎来到贝尔编程!")