save project

diy2.py

+sb=3
 username = "py"
 userpassword = "1"
 while True:
-    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
-    if name != username :
+    if sb>0 :
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        sb-=1
+        
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if name != username :
+            print("sb")
+            print("sbsbsbsbsb"+str(sb)+"aaaaaa")
+            continue
+            
+        if password != userpassword :
+            print("sb")
+            
+            print("sbsbsbsbsb"+str(sb)+"aaaaaa")
+            continue
+    else:
         print("sb")
-        continue
-    if password != userpassword :
-        print("sb")
-        continue
-
+        exit()
 print("欢迎来到贝尔编程!")