Case sensitive

This is a discussion on Case sensitive within the C++ Programming forums, part of the General Programming Boards category; Hi, I am using a string to compare A and S with tmp which can be a upper case value ...

  1. #1
    Registered User
    Join Date
    Feb 2009
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    1

    Case sensitive

    Hi,

    I am using a string to compare A and S with tmp which can be a upper case value or a lower case value so i wrote a program like this
    <code>
    if(strstr(tmp,"A")!=NULL || strstr(tmp,"S")!=NULL) || strstr(tmp,"s")!=NULL || strstr(tmp,"a")!=NULL)
    </code>
    Is there a different way of writing the case sensitive letter can i use && operator and write a code
    Last edited by soled_boy; 02-02-2009 at 12:55 PM.

  2. #2
    Registered User
    Join Date
    Jun 2005
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    5,864
    Well, actually, you're trying to do a case insensitive comparison

    The more usual technique would be to convert tmp to upper/lower case (you call as to whether upper or lower), and then do your test. By definition, a string converted to uppercase will never contain lowercase characters and vice versa.

    If the case of other parts of tmp matter in later code, convert a copy of tmp to upper/lower case, and do the test against the copy.

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