String error

This is a discussion on String error within the C Programming forums, part of the General Programming Boards category; I have a striing which is like : "#$Francis" so, char *u; char str[25]="#$Francis"; u = strstr(str, "#$"); u++;u++; so ...

  1. #1
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    String error

    I have a striing which is like :

    "#$Francis"

    so,

    char *u;
    char str[25]="#$Francis";
    u = strstr(str, "#$");
    u++;u++;

    so the u pointer now points to 'F'.

    when i run a loop to print out character by character from F to s in Francis, it somehow keeps stopping at 'n', it does not proceed to print out c, i or s, but instead prints out many many weird characters...

    any idea wat's wrong ehre?
    Only by the cross are you saved...

  2. #2
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    RE: string problem

    It looks fine to me. Maybe try writing a function that ignores # and $ or whatever and prints everything else. Whenever there seems to be no possible answer to a bug, it is best to cross reference and appoach it from different angles.

    Code:
    int a = 0;
    
    while (theString[a++])
    {
       if(theString[a] == EOF);
          return 0;
       if(theString[a] == '#' || theString[a] == '$')
          continue;
       else if(theString[a] == '\n')
          putchar('\n');   
       putc(theString[a]);
    }
    Hope that helps a little.

  3. #3
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    okok, thanx, it worked!

    do u know if there is a function in C whereby i can convert a string to upper case or vice versa?
    Only by the cross are you saved...

  4. #4
    It's full of stars adrianxw's Avatar
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    toupper() tolower(). Loop through your string using these functions on the individual characters.

    With your original problem, show the loop you are using to print out Francis.
    Wave upon wave of demented avengers march cheerfully out of obscurity unto the dream.

  5. #5
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    isn't this onli for single characters?

    i tried it on my string, and i got so many warning messages...

    how do i do it for a strinG?
    Only by the cross are you saved...

  6. #6
    It's full of stars adrianxw's Avatar
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    >>> Loop through your string using these functions on the individual characters.
    Wave upon wave of demented avengers march cheerfully out of obscurity unto the dream.

  7. #7
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    okay, done that

    another thing is, er.........i have a password field where users enter their password...
    is there any function in C which masks the characters for u? or must we do this ourselves?
    Only by the cross are you saved...

  8. #8
    It's full of stars adrianxw's Avatar
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    I can't think of a function in C, C++ yes and with operating system API functions, yes, I think you may just as well do it yourself.
    Wave upon wave of demented avengers march cheerfully out of obscurity unto the dream.

  9. #9
    and the Hat of Clumsiness GanglyLamb's Avatar
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    is there any function in C which masks the characters for u? or must we do this ourselves?
    Common question use puts to put a * on screen after reading in one character thus replacing the character with the *.

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