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Groups > comp.lang.c > #73983

Re: Problem with the function that should display new letter

From "D. Aaron Sawyer" <aaron@110.net>
Newsgroups comp.lang.c
Subject Re: Problem with the function that should display new letter
Date 2015-10-27 13:47 -0400
Organization Hardly any
Message-ID <n0od7d$jad$1@dont-email.me> (permalink)
References <35a13b2e-2412-40ea-89e4-1985879e542c@googlegroups.com> <n0ocqg$i1g$1@dont-email.me>

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On 2015.10.27 13:40, D. Aaron Sawyer wrote:
> On 2015.10.27 12:52, Alla _ wrote:
>> Hello!
>>
>> Please, take a look at a program that is supposed
>> to take the message (for now the message is given
>> with main function), and based on the value of some
>> key display the same message with letters produced
>> by 'original letter + key'.
>>
>> I have an issue with one part of this program, which
>> fail to produce the desired outcome. This part should
>> do the following:
>>
>> /** if the value of the sum 'original letter + key' is bigger
>>      than the value of 'z' (lower case) or 'Z' (upper case),
>>      then the value of the expression
>>      '(original letter + key)%26' is assigned to the new letter **/
>>
>> The program does convert characters when the sum of 'original letter
>>   + key' is within the range of 'a - z' or 'A-Z', and it
>> does display any other character unchanged (special characters, digits)
>> as it should. But it fails to produce the result I named above.
>>
> ...[snipped]...
>> Program:
>> /** Program to cipher the text **/
>>
>> #include <stdio.h>
>> #include <string.h>
>> #include <ctype.h>
>>
>> char alpha_low[] = "abcdefghijklmnopqrstuvwxyz";
>> char alpha_up[]  = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
>>
> ...[snipped]...
>>
>> int look_up (int alpha_letter)
>> {
>>      int i;
>>
>>      for (i = 1; i < 27; i++)
>>      {
>>          if (alpha_low [i] == alpha_letter || alpha_up [i] == alpha_letter)
>>              return i;
>>      }
>> }
>>
> [snipped]
>
> Please note that in C, arrays are indexed from 0, not 1.
> The return value from look_up() is one greater than it should be.

Also, what happens when the argument to look_up() is the letter "A"? Or the letter "a"?

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Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 09:52 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 10:06 -0700
    Re: Problem with the function that should display new letter John Gordon <gordon@panix.com> - 2015-10-27 17:16 +0000
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:28 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 10:09 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 10:12 -0700
    Re: Problem with the function that should display new letter Barry Schwarz <schwarzb@dqel.com> - 2015-10-27 13:12 -0700
      Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-27 13:23 -0700
        Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-27 13:49 -0700
          Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-27 21:27 +0000
            Re: Problem with the function that should display new letter Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-10-27 18:00 -0400
            Re: Problem with the function that should display new letter glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-28 02:53 +0000
              Re: Problem with the function that should display new letter Robert Wessel <robertwessel2@yahoo.com> - 2015-10-28 00:43 -0500
              Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 06:08 +0000
                Re: Problem with the function that should display new letter glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-28 08:44 +0000
            Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-28 09:26 +0100
              Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 08:44 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-28 10:40 +0100
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-28 06:44 -0700
              Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-28 06:35 -0700
  Re: Problem with the function that should display new letter "D. Aaron Sawyer" <aaron@110.net> - 2015-10-27 13:40 -0400
    Re: Problem with the function that should display new letter "D. Aaron Sawyer" <aaron@110.net> - 2015-10-27 13:47 -0400
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:38 -0700
        Re: Problem with the function that should display new letter "D. Aaron Sawyer" <aaron@110.net> - 2015-10-27 16:46 -0400
    Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:39 -0700
  Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-27 18:20 +0000
    Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:36 -0700
    Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 12:09 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:51 -0700
  Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-27 19:25 +0000
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 12:27 -0700
    Re: Problem with the function that should display new letter Ian Collins <ian-news@hotmail.com> - 2015-10-28 10:07 +1300
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-28 00:50 -0700
        Re: Problem with the function that should display new letter Ian Collins <ian-news@hotmail.com> - 2015-10-28 21:04 +1300
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-28 01:13 -0700
          Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 10:40 +0000
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 11:02 +0000
            Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-28 11:28 +0000
              Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 11:57 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 12:53 +0000
                Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-28 13:33 +0000
        Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 08:35 +0000
          Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 10:59 +0000
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 11:04 +0000
              Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 11:38 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 11:43 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 12:10 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 12:58 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 13:55 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 14:02 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 15:01 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 15:44 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 16:22 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 16:26 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 16:44 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 18:45 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 19:26 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 20:44 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-28 22:59 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 22:48 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-29 01:14 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 01:07 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-29 14:07 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 13:57 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-29 16:22 +0100
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-29 08:38 -0700
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-29 17:25 +0100
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-29 12:46 -0700
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-30 09:03 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 19:19 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-30 09:54 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-30 12:20 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 21:36 +0000
                Re: Problem with the function that should display new letter Ian Collins <ian-news@hotmail.com> - 2015-10-30 10:47 +1300
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 22:25 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-30 09:59 +0100
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-30 10:07 +0100
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-28 16:25 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 16:01 +0000
                Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-28 09:50 -0700
                Re: Problem with the function that should display new letter glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-28 21:57 +0000
                Re: Problem with the function that should display new letter Geoff <geoff@invalid.invalid> - 2015-10-28 18:25 -0700
                Re: Problem with the function that should display new letter Geoff <geoff@invalid.invalid> - 2015-10-28 18:23 -0700
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 01:44 +0000
            Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-28 07:07 -0700
          Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 07:07 -0700
            Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-30 09:08 -0700
              Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 14:29 -0700
                Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-30 16:10 -0700
                Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 20:27 -0700
                Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-31 12:40 -0700
                Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-02 02:16 -0800
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 03:36 -0700
    Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 10:46 +0000
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 03:56 -0700
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:00 -0700
        Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:02 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:05 -0700
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:14 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:14 -0700
            Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 11:26 +0000
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:26 +0000
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 05:29 -0700
                Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-29 09:23 -0400
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 07:44 -0700
                Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-29 11:39 -0400
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 09:52 -0700
                Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-29 16:02 +0000
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 09:56 -0700
                Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-29 13:41 -0400
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 17:46 +0000
                Re: Problem with the function that should display new letter Udyant Wig <udyantw@gmail.com> - 2015-10-30 00:14 +0530
                Re: Problem with the function that should display new letter raltbos@xs4all.nl (Richard Bos) - 2015-10-29 19:30 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 22:08 +0000
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 22:28 -0700
                Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 08:10 -0700
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-30 08:56 -0700
                Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 13:18 -0700
                Re: Problem with the function that should display new letter Ian Collins <ian-news@hotmail.com> - 2015-10-30 09:11 +1300
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 01:21 -0700
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:04 -0700
        Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:11 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:19 -0700
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:24 +0000
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 05:26 -0700
                Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-29 08:31 -0700
            Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-29 09:42 -0400
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 08:31 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 10:17 -0700
    Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 17:36 +0000
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 01:18 -0700
        Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 08:36 +0000
          Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 08:38 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 02:26 -0700
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 09:32 +0000
              Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-30 13:39 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 03:59 -0700
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 11:18 +0000
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:24 -0700
                Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-30 14:18 -0400
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:34 -0700
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 13:39 +0000
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:57 -0700
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-11-01 09:06 +0000
            Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-30 08:49 -0700
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 10:18 -0700
    Re: Problem with the function that should display new letter Barry Schwarz <schwarzb@dqel.com> - 2015-10-29 11:48 -0700
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 01:23 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 01:42 -0700
    Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 09:13 +0000
    Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-30 10:17 +0000
      Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 10:23 +0000
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:39 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:45 -0700
    Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 13:55 +0000
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 07:05 -0700
    Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-30 23:29 +0000
      Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 01:14 +0000
        Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 17:02 +0000
          Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 18:05 +0000
            Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 23:46 +0000
              Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-11-01 08:46 -0800
                Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-11-01 23:43 +0000
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-11-01 16:05 -0800
              Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-01 21:41 +0000
                Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-11-01 22:46 +0000
          Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-31 18:22 +0000
            Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 23:57 +0000
        Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 17:20 +0000
      Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-31 13:38 +0000
        Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-31 11:28 -0700
          Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-11-01 00:06 +0000
        Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 17:58 +0000
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-31 01:14 -0700

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