Homework & Coursework Questions

#define   IS_WHITE_SPACE(c)   ((c) == ' ' || (c) == '\t' || (c) == '\n')

#include <stdio.h>
#include "roman.h"
#include "romanutil.h"
#include "chrutil.h"

int get_roman(void)
/*  This function reads the next number in roman numerals from the input
        and returns it as an integer  */
{  char rdigit;
   int  num = 0;
   int  dig_value, last_dig_value = M;
        /*  get the first digit  */
        rdigit = getchar();

        /* if the function reads 0 */

        if (is_roman(rdigit)==0)
        {
        printf("No Such Thing\n" );
                //return 0;
        }


        /*  while it is a roman digit or a white space  */

        while( is_roman(rdigit))
        {
                        /*  convert roman digit to its value  */
                        dig_value = convert_roman(rdigit);
                        /*  if previous digit was a prefix digit  */
                        if(dig_value > last_dig_value)
                                /*  adjust total  */
                                num = num - 2 * last_dig_value + dig_value;
                        /*  otherwise accumulate the total  */
                        else num = num + dig_value;
                        /*  save this digit as previous  */
                        last_dig_value = dig_value;


                /*  get next digit  */
                rdigit = getchar();
        }

        /*  return EOF if detected  */
        if(rdigit == EOF) return EOF;


                 /* if there is a white space*/
                if(IS_WHITE_SPACE(rdigit))
                {
                        while(rdigit!='\n')
                        {
                        getchar();
                        return num;
                        }
                }


        /*  return the number  */
        return num;
}

int c;

while((c = getchar()) != EOF) {
    if(IS_WHITE_SPACE((char) c))
        continue;
    /* now check for is_roman here and do the processing */
}