เมนู DOS-style

สมัยก่อน โปรแกรมที่ใช้ DOS จะนิยมเขียนเป็นเมนู
เลยทดลองสร้างดู

รหัสโปรแกรม main.c

/*  
    by Chakkree Tiyawongsuwan
    10 Feb 2008
*/

include 
include 

include "menu.h"
    
int main(){
  int i , num_munu;  
  MENU_ITEM Main_menu[] = {
      {1,"Add"}, 
      {2,"Delete"}, 
      {3,"Edit"}, 
      {0,"Exit"}
  };
  
  num_munu = sizeof(Main_menu) / sizeof(MENU_ITEM);
  i =  ChooseMenu(Main_menu, "Main Menu"  , num_munu);
  
  printf("\n\nyou choose menu no. %d \n" , i);
  
  system("PAUSE"); 
  return 0;
}

รหัสโปรแกรม menu.h

/*  
    by Chakkree Tiyawongsuwan
    10 Feb 2008
*/

#ifndef  _MENU_
  #define _MENU_

  #define FALSE 0
  #define TRUE 1

  typedef struct menu {
    int id;
    char name[10];
  } MENU_ITEM;

  int ChooseMenu(MENU_ITEM Menu[], char *msg ,int n);

#endif

รหัสโปรแกรม menu.c

/*  
    by Chakkree Tiyawongsuwan
    10 Feb 2008
*/
#include "menu.h"

int ChooseMenu(MENU_ITEM Menu[], char *msg ,int n){
  int i ,ch , done;
  MENU_ITEM *myMenu;
  
  done = FALSE;
  //num_munu = sizeof(Menu) / sizeof(MENU_ITEM);
  
  do{
    system("CLS");    
    printf("===================\n");
    printf(" %s\n", msg);
    printf("===================\n");
        
    myMenu = Menu;
    for (i= 0; i < n; i++){
         printf("%5d  %-10s\n",myMenu->id , myMenu->name);  
         myMenu++;
    } 
    printf("\n Select : ");

    myMenu = Menu;
    for (i= 0; i < n; i++) {
         printf("%d " ,myMenu->id );
         myMenu++;
    }
    printf(" : ");
    scanf("%d", &ch);

    myMenu = Menu;
    for (i= 0; i < n; i++) {
        if (ch==myMenu->id) { 
          done = (ch==myMenu->id);
          myMenu++;
          break;
        }
        myMenu++;
    }
  } while(!done); 
  
  return ch;
}