/* ---------------------------------------------------------------------
 * GETKEY3.C    Read keyboard character without echo, convert
 *              to upper case and display to Standard Output
 *
 * "3rd Generation" Programming Language demo for CIS 120
 * Duplicate as near as possible Machine Language and Assembly Language
 * versions created with DEBUG.
 * Note that the library function toupper() only makes the conversion
 * to uppercase if the character is lower case, so the
 * if ( islower( ch ) ) is not strictly needed, but it shows the high-
 * level language version of the same code in assembly.
 *
 * Mike Huffman, Portland Community College
 * Computer Information Systems, Winter Term, 2001
 *
 * Last update: 10 FEB 2001
 * ---------------------------------------------------------------------
 */
#include <stdio.h>          /* putchar()            */
#include <conio.h>          /* getch()              */
#include <ctype.h>          /* toupper(), islower() */

/* all C/C++ programs have a main() function that return an integer
 * value to the operating system, 0 is the usual "success" code
 */
int main()
{
    int ch;                             /* keyboard character         */

    do {                                /* loop at least once         */
        ch = getch();                   /* read char from keyboard    */

        if ( islower( ch ) )            /* if char is lower case      */
            ch = toupper( ch );         /* convert to upper case      */

        /* display the character; a "real" program would now use the
         * upper case character to make, say, menu choices
         */
        putchar( ch );
    } while ( ch != 'Q' );              /* loop until char = 'Q'      */

    return 0;                           /* return success code to DOS */
}