Thread: Creating a C menu using Up Down

Several of the defined keys rely on the system using ansi.sys, which was very common in DOS days, but not so much nowadays. My suggestion is to replace them, with either keyboard scan codes, or Windows equivalent way of doing it.

The basic program looks OK, but the define keys are ready for the bin.

If you don't have a table of the PC key scan values, Google has dozens of sites with them. If you want to use the Windows version, goto the MSDN library and they explain it all and give an example of their (typically somewhat more complicated), way of handling it.

Thanks guys for the help i've gotten piece to work. Still trying to figure out the rest. p.s i am using DEV C++ to do all my programming.

Originally Posted by Salem

I could tell you to stop digging for fossils and upgrade to a compiler for this millenium.

Code::Blocks
smorgasbordet - Pelles C

See, if we help you with TurboCrap, it only prolongs it's agonising death. Only when tutors finally figure out there is no longer any free tech support on the web will they stop pushing this old crap on people.

You're right but i'm not doing turbo C lol i used a Turbo C book as reference for a menu i was making... but i wasn't sure what i could do to make it not show those random chars. I was hoping someone can do a cross reference to the #define constants.
i.e instead of #define CLEAR "\x1B[2J" use #define CLEAR "example" ... something like that.

Here's a version for you, that does what you want.

Don't tell Quzah about the yellow text on a blue background output, because he gets really grumpy when he thinks he knows it all, and finds out he really doesn't.

Note how some keys give off more than one value, so if the first value is a zero, it uses the second value.

Code:

#include <stdio.h>

#define ESC 27
#define F1 59
#define F2 60
#define F3 61
#define F4 62
#define F5 63
#define F6 64
#define F7 65
#define F8 66
#define F9 67
#define F10 68
#define HOME 71
#define UP 72
#define PAGE_UP 73
#define LEFT 75
#define RIGHT 77
#define END 79
#define DOWN 80
#define PAGE_DOWN 81

int main(void) {

  char key;
  char msg[20];
  textbackground(1);
  textcolor(14);
  printf("\n\n\t\t\t     press escape to quit\n\n") ;
  do {
    key = getch();
    if (key == 0) {
      key = getch(); //key code has two keys - read the second one
      switch (key) {
        case F1: memcpy(msg,"F1", sizeof(msg)); break;
        case F2: memcpy(msg,"F2", sizeof(msg)); break;
        case F3: memcpy(msg,"F3", sizeof(msg)); break;
        case F4: memcpy(msg,"F4", sizeof(msg)); break;
        case F5: memcpy(msg,"F5", sizeof(msg)); break;
        case F6: memcpy(msg,"F6", sizeof(msg)); break;
        case F7: memcpy(msg,"F7", sizeof(msg)); break;
        case F8: memcpy(msg,"F8", sizeof(msg)); break;
        case F9: memcpy(msg,"F9", sizeof(msg)); break;
        case F10: memcpy(msg,"F10", sizeof(msg)); break;
        case PAGE_UP: memcpy(msg,"PAGE UP", sizeof(msg)); break;
        case PAGE_DOWN: memcpy(msg,"PAGE DOWN", sizeof(msg)); break;
        case HOME: memcpy(msg,"HOME", sizeof(msg)); break;
        case END: memcpy(msg,"END", sizeof(msg)); break;
        case UP: memcpy(msg,"UP", sizeof(msg)); break;
        case DOWN: memcpy(msg,"DOWN", sizeof(msg)); break;
        case LEFT: memcpy(msg,"LEFT", sizeof(msg)); break;
        case RIGHT: memcpy(msg,"RIGHT", sizeof(msg)); break;
        default:  memcpy(msg,"unknown key", sizeof(msg)); break;
      }
      cprintf("Key: %s", msg);
      putchar('\n');
      continue;
    }
    if(key == ESC) {
      cprintf("Key: ESCAPE");
      putchar('\n');
    }
    else {
      cprintf("Key: %c", key);
      putchar('\n');
    }
  }while (key != ESC); 

  printf("\n\n\t\t\t     press enter when ready");
  (void) getchar();  //hold the console window open
  return 0;
}

You can't compile this unless you have a non standard compiler extension, that smartly links in the needed header. One like RockLee has.