Adjoining Strings

This is a discussion on Adjoining Strings within the C++ Programming forums, part of the General Programming Boards category; I would like to display strings and few spaces after each string in a menu form i.e Code: # 1. ...

  1. #1
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    Adjoining Strings

    I would like to display strings and few spaces after each string in a menu form

    i.e
    Code:
    #   1. First Menu      #
    #   2. Second Menu     #
    etc...

    using..
    Code:
     int choice =1;
            string descr = "First Menu";
    
    	cout << "     \t\t#" << choice <<  "."  <<  descr << "                    #\n";
    But the spaces after description will vary which will place the last '#' on different position, or badly aligned...

    My solution to this is have two strings
    Code:
         string descr;
         string whiteSpace = "                 ";
    How do i join these two in such a way that descr overlaps (occupied the first part of ) whitespace?

  2. #2
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    Perhaps you'd like to use setw() to indicate how wide you want the spacing to be? You can use setw() on a " " too...

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  3. #3
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    You just need to calculate how many spaces to add, then create a string with the appropriate number of spaces. Adapting your solution:
    Code:
    const int max_descr_width = 16;
    string descr = "First Menu";
    string whiteSpace(max_descr_width - descr.length(), ' ');

  4. #4
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    Quote Originally Posted by matsp View Post
    Perhaps you'd like to use setw() to indicate how wide you want the spacing to be? You can use setw() on a " " too...

    --
    Mats
    Yes but still the start position to display setw(x) X number of times depends on the lenght of the preceding string..
    i.e
    Code:
    cout  <<  "James" << set(5) << "     " <<  "%";
    cout  <<  "Michelangelo" << set(5) << "     " << "%" ;
    % will be displayed 5 spaces after James, 5 spaces after Michelangelo.....

  5. #5
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    Yes, so you have to do setw() on the first part of the line too:
    Code:
    cout  <<  setw(12) << "James" << set(5) << "     " <<  "%";
    cout  <<  setw(12) << "Michelangelo" << set(5) << "     " << "%" ;
    Of course, the solution suggested by Daved is also good.

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  6. #6
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    Quote Originally Posted by Daved View Post
    You just need to calculate how many spaces to add, then create a string with the appropriate number of spaces. Adapting your solution:
    Code:
    const int max_descr_width = 16;
    string descr = "First Menu";
    string whiteSpace(max_descr_width - descr.length(), ' ');
    How do i append a character at the and of a string of type string? strncat() copies from strings, not character., and i think it works with char *

  7. #7
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    The easiest way is to use +=.

  8. #8
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    Quote Originally Posted by Daved View Post
    The easiest way is to use +=.
    didn't know u can do that...thnx

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