Results 1 to 10 of 10

Thread: Strings to char*

  1. #1

    Thread Starter
    Frenzied Member Technocrat's Avatar
    Join Date
    Jan 2000
    Location
    I live in the 1s and 0s of everyones data streams
    Posts
    1,024

    Strings to char*

    How do you change a string to a char* ?
    MSVS 6, .NET & .NET 2003 Pro
    I HATE MSDN with .NET & .NET 2003!!!

    Check out my sites:
    http://www.filthyhands.com
    http://www.techno-coding.com


  2. #2
    Frenzied Member Vlatko's Avatar
    Join Date
    Aug 2000
    Location
    Skopje, Macedonia
    Posts
    1,409
    Well in C++ a string is an array of char. Do you mean the <string> class. To make it a c string use :
    Code:
    string mystr = "string";
    mystr.c_str(); // makes it a c string
    I am become death, the destroyer of worlds.
    mail:[email protected]

    • Visual Basic 6.0 & .NET
    • Visual C++ 6.0 & .NET
    • ASP
    • LISP
    • PROLOG
    • C
    • Pascal

  3. #3

    Thread Starter
    Frenzied Member Technocrat's Avatar
    Join Date
    Jan 2000
    Location
    I live in the 1s and 0s of everyones data streams
    Posts
    1,024
    The problem I have is I got a VAR that is a string (<string>) and I need to pass it to a function that requires a char* or a LPCTSTR. I figure I could loop through the array and passing each char to a temp char array, but I figure there must be an easier way.
    MSVS 6, .NET & .NET 2003 Pro
    I HATE MSDN with .NET & .NET 2003!!!

    Check out my sites:
    http://www.filthyhands.com
    http://www.techno-coding.com


  4. #4
    Frenzied Member Vlatko's Avatar
    Join Date
    Aug 2000
    Location
    Skopje, Macedonia
    Posts
    1,409
    Well use
    Code:
    mystr.c_str();
    I am become death, the destroyer of worlds.
    mail:[email protected]

    • Visual Basic 6.0 & .NET
    • Visual C++ 6.0 & .NET
    • ASP
    • LISP
    • PROLOG
    • C
    • Pascal

  5. #5

    Thread Starter
    Frenzied Member Technocrat's Avatar
    Join Date
    Jan 2000
    Location
    I live in the 1s and 0s of everyones data streams
    Posts
    1,024
    Tried that, said it could not convert from string (acually a long class of char*) to a char*. Maybe I am using it wrong. Example?
    MSVS 6, .NET & .NET 2003 Pro
    I HATE MSDN with .NET & .NET 2003!!!

    Check out my sites:
    http://www.filthyhands.com
    http://www.techno-coding.com


  6. #6
    Frenzied Member Vlatko's Avatar
    Join Date
    Aug 2000
    Location
    Skopje, Macedonia
    Posts
    1,409
    Post some code?
    I am become death, the destroyer of worlds.
    mail:[email protected]

    • Visual Basic 6.0 & .NET
    • Visual C++ 6.0 & .NET
    • ASP
    • LISP
    • PROLOG
    • C
    • Pascal

  7. #7

    Thread Starter
    Frenzied Member Technocrat's Avatar
    Join Date
    Jan 2000
    Location
    I live in the 1s and 0s of everyones data streams
    Posts
    1,024
    It actually makes no differnce until I get my class working.

    http://161.58.186.97/showthread.php?s=&threadid=79765
    MSVS 6, .NET & .NET 2003 Pro
    I HATE MSDN with .NET & .NET 2003!!!

    Check out my sites:
    http://www.filthyhands.com
    http://www.techno-coding.com


  8. #8
    Monday Morning Lunatic parksie's Avatar
    Join Date
    Mar 2000
    Location
    Mashin' on the motorway
    Posts
    8,169
    string.c_str() returns a const char* pointer to the data string, so you can't change the contents. If you actually want to obtain the data, you need to use strcpy on it. This is another good reason for using const well in your code.
    I refuse to tie my hands behind my back and hear somebody say "Bend Over, Boy, Because You Have It Coming To You".
    -- Linus Torvalds

  9. #9

    Thread Starter
    Frenzied Member Technocrat's Avatar
    Join Date
    Jan 2000
    Location
    I live in the 1s and 0s of everyones data streams
    Posts
    1,024
    DOH!!!
    Thats why it dont work. Man I hate making stupid mistakes like that
    MSVS 6, .NET & .NET 2003 Pro
    I HATE MSDN with .NET & .NET 2003!!!

    Check out my sites:
    http://www.filthyhands.com
    http://www.techno-coding.com


  10. #10
    Monday Morning Lunatic parksie's Avatar
    Join Date
    Mar 2000
    Location
    Mashin' on the motorway
    Posts
    8,169
    I really wish they'd make things like that obvious Would've made my life a lot easier

    Anyway, I'm off to look at your other thread now...
    I refuse to tie my hands behind my back and hear somebody say "Bend Over, Boy, Because You Have It Coming To You".
    -- Linus Torvalds

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  



Click Here to Expand Forum to Full Width