save project

diy2.py

+z=3
 username = "1"
 username = "1"
 userpassword = "2"
 userpassword = "2"
 while True:
 while True:
-    c= input("请输入用户名:")
-    d = input("请输入密码:")
-    if c == username and d == userpassword:
-        print("登录成功!")
-        break
-    if username!=c:
-        print("账号名不存在，请重新输入")
-    if userpassword!=d:
-        print("密码输入有误，请重新输入")
+    if z>0:
+        c= input("请输入用户名:")
+        d = input("请输入密码:")
+        z-=1
+        if c == username and d == userpassword:
+            print("登录成功!")
+            break
+        if username!=c:
+            print("账号名不存在，请重新输入")
+        if userpassword!=d:
+            print("密码输入有误，请重新输入")
+    else:
+        print("次数已用完")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file