if statement.

This is a discussion on if statement. within the C++ Programming forums, part of the General Programming Boards category; is that right to use if statement to check.... inFile.open(FileName,ios::in); inData.get(Ch); if(Ch=='//') //Q?? check the source begin with '//' { ...

  1. #1
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    Question if statement.

    is that right to use if statement to check....

    inFile.open(FileName,ios::in);
    inData.get(Ch);
    if(Ch=='//') //Q?? check the source begin with '//'
    {
    ......
    }



    source:
    //some command;

  2. #2
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    Dec 2001
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    i think its ok to use if statements, i dont know how else you are going to check..

    >>if(Ch=='//')

    in char datatypes ( == ) work for just one char not 2

    You'll have to use probably

    inData.get(Ch,2,'\n');

    and then use strcmp to check

    if((strcmp(ch,"\\")==0)
    {
    ---
    ---
    }

  3. #3
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    the first \ is the is the escape operator as which allows you to use \n to mean newline or \t to mean tab or \b to mean backspace or \* to mean start of comment section, etc. Therefore to test to see if there is a single \ in a string or if it is stored in a char variable you need to say something like:

    char ch == //whatever;
    if(ch == '\\')

    However, I don't think the same holds for /. Otherwise you couldn't use the / as indicative of division operator. Therefore // should be a string of two / and can't be evaluated using the == operator but will need to checks for chars or strcmp().

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