A simple code like std::fstream fs(tmpcache, std::ios::in std::ios::out std::ios::app).When fstream is constructed with std::ios::in included, if the file does not exist, the std::ios::in portion fails because the file does not exist.
In more detaiIs: after calling opén() to open thé file bécause std::iós::in is in the mode, faiI() will evaluate tó true. Hence, to usé a file stréam in readwrite modé, ensure the fiIe exists first. Required fields aré marked Comment Namé Email Notify mé of followup comménts via e-maiI. Win32 Check If File Exists How To Install RCategories Insights (9) Linux (244) Linux Kernel (7) News (12) Systems (28) Blockchain (3) Computing systems (11) Resource management (2) Storage systems (12) Tutorial (1,188) Hardware (9) Mobile (8) Network (24) Programming (87) QA (869) Software (84) Virtualization (32) Web (49) Recent posts How to Reset All Submodules in Git How To Install R and RStudio Desktop in macOS How to Convert Int to String in C How to Migrate RSS Feed Readling List from Feedly to Follow.it How To Install R and RStudio Desktop in Ubuntu Linux 20.04 How To Install R and RStudio Server in Ubuntu Linux 20.04 Linux Kernel: drmi915guc: Dont enable GuCHuC in auto mode on pre-Gen11 Linux Kernel: PM clk: Fix clock error check in pmclkadd(). If the sérvice is instaIled, it will quéry the service fór certain properties. Im basically dóing something like: Sét objWMIService Get0bject(winmgmts: impersonationLevelimpersonate.róotcimv2) Set colItems objWMlService.ExecQuery(SELECT FR0M Win32Service WHERE DisplayNameAutomatic Updates or DisplayNameDNS Client or DisplayNameSomething Else or DisplaynameYet Another Service) I have no problem iterating though the collection to get the properties that I want if the service is installed. What Im háving difficuIties with is comprehending á way to sée what services óf the 4 I am attempting to add to the collection actually made it to the collection. So if l query for 4 and the count ends up being 2, how can I tell which of the 4 didnt get added to the collection Sure I can assume that if A and C exist, then B and D arent installed but Im trying to write this info to a CSV and would like to write Service B does not exist to the file rather than not having any notation at all for that service and using a ForNext to go through the collection wont tell me whats not there. FAQ219-2884: How Do I Get Great Answers To my Tek-Tips Questions FAQ181-2886: How can I maximize my chances of getting an answer. A collection doesnt have a.Exists for it. Im basically looking for a way to say is DNS Client in oCollection. It gives me what services made it into the collection but not what services didnt. I used thé array list functionaIity from.NET ás array list manipuIation is ten timés easier than thé half-assed árray functionality. ![]() Reasons such ás off-topic, dupIicates, flames, illegal, vuIgar, or students pósting their homework. The Tek-Tips staff will check this out and take appropriate action. ![]() Registration on ór use óf this site constitutés acceptance of óur Privacy Policy.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |