Getch Refresh? Simple Problems with Getch()

This is a discussion on Getch Refresh? Simple Problems with Getch() within the C Programming forums, part of the General Programming Boards category; I use DevC++ and I have 2 problems Code: #include<stdio.h> #include<conio.h> main() { int x = getch(); printf("1st getch = ...

  1. #1
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    Getch Refresh? Simple Problems with Getch()

    I use DevC++
    and I have 2 problems

    Code:
    #include<stdio.h>
    #include<conio.h>
    
    
    main()
    {
          int x = getch();
          
          printf("1st getch = %d",x);
          getch();
          printf("2nd getch = %d",x);
          getch(); 
          printf("3rd getch = %d",x);
          
    }
    First Problem: When I declare x = getch(); the getch there is not excluded, I mean you still need to put a value to go to the next statement. Is it possible skipping it in declaring for a variable?

    Second Problem: The value of the my first getch() will be the value of all getch, I need a way to refresh it or delete the value of it.
    For Example: I press Enter
    Ascii Value of Enter is 13
    Output would be:

    1st Getch = 13
    2nd Getch = 13 //I press other keys
    3rd Getch = 13 //I press a different key

    What I want is like
    Output:

    1st Getch = 13
    2nd Getch = ## //The Ascii Value of another key
    3rd Getch = ## // The Ascii Value of another key

    Please Help . I'm trying to solve this for 2 hours now, I tried fflush(stdin) but it wont work.

  2. #2
    ATH0 quzah's Avatar
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    If you want to keep track of the key that getch is returning, you need to assign it to something. The line where you declare a variable doesn't magically make it refresh every time getch() is called.
    Code:
    int first, second, third;
    
    first = getch();
    second = getch();
    third = getch();
    Assigns three different return calls to the appropriate variables.


    Quzah.
    Hope is the first step on the road to disappointment.

  3. #3
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    But Wait. If I did that the declaration of getch in the variables will not be excluded

    Code:
    #include<stdio.h>
    #include<conio.h>
    
    
    main()
    {
          int x = getch(),y = getch(),z = getch();
          
          getch();
          printf("1st getch = %d",x);
          getch();
          printf("2nd getch = %d",y);
          getch(); 
          printf("3rd getch = %d",z);
          getch();
    }
    Here you will see I want is, before the printf It will ask the getch()
    Before printf First Getch, that value of getch I want for my printf First Getch
    Not the vualue in my declarations

  4. #4
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    Code:
    #include<stdio.h>
    #include<conio.h>
    
    
    main()
    {
          int x = getch();
          
          printf("1st getch = %d",x);
          x = getch();
          printf("2nd getch = %d",x);
          x = getch(); 
          printf("3rd getch = %d",x);
          
    }
    And you should be using getchar() not getch()

  5. #5
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    If I use getchar() I need to press Enter to execute it

    Ok my project is like object oriented or a cheat way of having one

    Like If I press left key the left box will have a border and if I press enter it will go to a function vice versa to the right

    I use getch() because I don't need to press Enter when I input a key stroke

  6. #6
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    Ok... but you still need to capture the return value of the call *every single time*.

    Code:
    while (1)
      {   switch( getch() )
           {
               case '1' :
                   printf("Function #1");
                   break;
               case '2' :
                   printf("Function #2");
                   break;
    
               // and more cases as needed
    
               case 'Q' :
                  printf("Bye Bye For Now!);
                  exit(0);
              default :
                  printf("Unrecognized entry"); } }
    And... what you are writing is not even close to object oriented sillyness ... er, I mean "code"... what you are trying to emulate is a windows message queue... and in that case why not use the real deal?

    http://www.winprog.org/tutorial/
    Last edited by CommonTater; 10-26-2011 at 12:30 AM.

  7. #7
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    Ok but How will I put it Arrow Keys?
    Your solution is great but my problem now is arrow keys

  8. #8
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    Damn I got it, Thanks dude, I found a way. I convert it to be a int

    New Problem

    Arrow Keys give two values(I think) cause It activate Case 224 and Default
    Both are showing up
    Last edited by justin777; 10-26-2011 at 01:26 AM.

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