// roman.c: exercise to learn C with structs and strings
// compile with c11 or later (gcc -std==c11 roman.c)
//   On Windows, can just use the command gcc roman.c
//   You can use CLion as well if you wish.

#include <string.h>
#include <stdio.h>

// the functions appear before main; usually they would be the other way around,
//   but this organization is simpler

#define MAX_NUMBERS 20

// declare a structure for a number with two fields, one containing the text of
//   the number (up to 50 characters; use #define to create a C-style constant)
//   and the value (an int). You can add other fields if you like.




// read a number into a parameter, target; you must declare target 
//    as a pointer to the roman number struct
// The scanf reads a single word (which will be on its own line) into
//    tmp; you'll copy this into the roman number and set the integer
//    value in the structure
// You can assume the input is less than 50 characters.

void read_number( ) {
  char tmp[MAX_LENGTH];
  scanf("%s", tmp);
  if ( !feof(stdin) ) { // check for end of file - very nearly the same as !cin.eof()
    // assign target's text to be a copy of tmp's data

    // todo: add code to set the value field of the struct; this will require an if statement

  }
}

// substitute VIIII with IX, IIII with IV; can assume just one of either in string
//   (so look backwards). You must use strcmp and strcat in your answer.

void simplify_number( ) {
  int len = strlen(""); // todo: get string field of your struct

  // hint: if length < 4, do nothing
  // then: use strcmp to see if last 5 characters are "VIIII"; if so,
  //    truncate the string at length - 5, use strcat to add "IX" at the end
  // If the last 5 characters are "IIII", truncate the string at length - 4
  //    (by setting character length - 4 to \0), add "IV" at the end

}

// yes, this should use more functions! But using less makes this easier.

int main() {
  // todo: declare an array of MAX_NUMBERS structs called xs
  
  int count = 0;

  printf("Enter roman numbers:\n");
  read_number(&xs[0]);
  while ( count < MAX_NUMBERS && !feof(stdin) ) {
    count++;
    // todo: pass xs[count] to read_number
    read_number(  );
  }

  for(int i = 0; i < count; ++i)
    // todo: pass xs[i] to simplify_number
    simplify_number( );

  int sum = 0;
  for(int i = 0; i < count; ++i) {
    // add the i'th value to sum
    sum += 0;
  }

  printf("Rewritten numbers:\n");
  for(int i = 0; i < count; ++i)
    // print the i'th roman number
    printf("%s\n", "todo");

  printf("Sum: %d\n", sum);

  return 0;
}