Reading Blank Char

This is a discussion on Reading Blank Char within the C Programming forums, part of the General Programming Boards category; Code: #include <stdio.h> #include <conio.h> main() { char a,b; printf ("Enter the first character: "); scanf ("%c",&a); printf ("Enter the ...

  1. #1
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    Mar 2010
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    Reading Blank Char

    Code:
    #include <stdio.h>
    #include <conio.h>
    
    main()
    {
          char a,b;
          printf ("Enter the first character: ");
          scanf ("%c",&a);
          printf ("Enter the second character: ");
          scanf ("%c",&b);
          printf ("\n");
          if (a>b)
             printf ("a is larger than b");
          getch();
    }
    Hey,
    {Java-programmer, new to C, read tutorials, Googled, FAQed)

    Problem: Run the code, and the software automatically assigns blank character to b {i think ASCII = 10}.
    It doesn't even give me the chance to insert a value to b!
    Why?
    Thank for helping.
    Last edited by godingly; 03-03-2010 at 09:02 AM.

  2. #2
    Registered User
    Join Date
    Sep 2006
    Posts
    8,868
    add this:

    getchar();

    right after your first scanf(). That will remove the newline from the keyboard buffer, and allow scanf()'s second call, to go as you want.

    And welcome!

  3. #3
    Registered User hk_mp5kpdw's Avatar
    Join Date
    Jan 2002
    Location
    Northern Virginia/Washington DC Metropolitan Area
    Posts
    3,793
    You can also add a space in front of the %c for the second scanf to tell it to ignore leading whitespace.
    Code:
    printf ("Enter the second character: ");
    scanf (" %c",&b);
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

  4. #4
    Registered User
    Join Date
    Mar 2010
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    Thanks both of you!
    {fully answered}

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