/****************************************************************************** Product:  Calculator Example* Last Updated for Version: 4.0.00* Date of the Last Update:  Apr 07, 2008**                    Q u a n t u m     L e a P s*                    ---------------------------*                    innovating embedded systems** Copyright (C) 2002-2008 Quantum Leaps, LLC. All rights reserved.** This software may be distributed and modified under the terms of the GNU* General Public License version 2 (GPL) as published by the Free Software* Foundation and appearing in the file GPL.TXT included in the packaging of* this file. Please note that GPL Section 2[b] requires that all works based* on this software must also be made publicly available under the terms of* the GPL ("Copyleft").** Alternatively, this software may be distributed and modified under the* terms of Quantum Leaps commercial licenses, which expressly supersede* the GPL and are specifically designed for licensees interested in* retaining the proprietary status of their code.** Contact information:* Quantum Leaps Web site:  http://www.quantum-leaps.com* e-mail:                  info@quantum-leaps.com*****************************************************************************/#include "qp_port.h"#include "bsp.h"#include "calc.h"#include <stdio.h>#include <conio.h>#include <dos.h>/*..........................................................................*/int main() {    Calc_ctor();            /* explicitly instantiate the calculator object */    printf("Calculator example, QEP version: %s\n"           "Press '0' .. '9'     to enter a digit\n"           "Press '.'            to enter the decimal point\n"           "Press '+'            to add\n"           "Press '-'            to subtract or negate a number\n"           "Press '*'            to multiply\n"           "Press '/'            to divide\n"           "Press '=' or <Enter> to get the result\n"           "Press 'c' or 'C'     to Cancel\n"           "Press 'e' or 'E'     to Cancel Entry\n"           "Press <Esc>          to quit.\n\n",           QEP_getVersion());    QHsm_init(the_calc, (QEvent *)0);         /* trigger initial transition */    for (;;) {                                                /* event loop */        CalcEvt e;                                      /* Calculator event */        BSP_display();                                  /* show the display */        e.key_code = (uint8_t)getche();             /* get a char with echo */        printf(": ");        switch (e.key_code) {            case 'c':                         /* intentionally fall through */            case 'C': {                ((QEvent *)&e)->sig = C_SIG;                break;            }            case 'e':                         /* intentionally fall through */            case 'E': {                ((QEvent *)&e)->sig = CE_SIG;                break;            }            case '0': {                ((QEvent *)&e)->sig = DIGIT_0_SIG;                break;            }            case '1':                         /* intentionally fall through */            case '2':                         /* intentionally fall through */            case '3':                         /* intentionally fall through */            case '4':                         /* intentionally fall through */            case '5':                         /* intentionally fall through */            case '6':                         /* intentionally fall through */            case '7':                         /* intentionally fall through */            case '8':                         /* intentionally fall through */            case '9': {                ((QEvent *)&e)->sig = DIGIT_1_9_SIG;                break;            }            case '.': {                ((QEvent *)&e)->sig = POINT_SIG;                break;            }            case '+':                         /* intentionally fall through */            case '-':                         /* intentionally fall through */            case '*':                         /* intentionally fall through */            case '/': {                ((QEvent *)&e)->sig = OPER_SIG;                break;            }            case '=':                         /* intentionally fall through */            case '\r': {                                       /* Enter key */                ((QEvent *)&e)->sig = EQUALS_SIG;                break;            }            case '\33': {                                        /* ESC key */                ((QEvent *)&e)->sig = OFF_SIG;                break;            }            default: {                ((QEvent *)&e)->sig = 0;                   /* invalid event */                break;            }        }        if (((QEvent *)&e)->sig != 0) {           /* valid event generated? */            QHsm_dispatch(the_calc, (QEvent *)&e);        /* dispatch event */        }    }    return 0;}