12.c

#include<stdio.h>
#include<stdlib.h>

char*intToRoman(intnum) {
char*s= (char*)calloc(10, sizeof(char));
inti=0;
while (num>0) {
while (num >= 1000) {
s[i] ='M';
num-=1000;
i++;
 }
if (num >= 900) {
s[i] ='C'; s[i+1] ='M';
i+=2;
num-=900;
 }
while (num >= 500) {
s[i] ='D';
num-=500;
i++;
 }
if (num >= 400) {
s[i] ='C'; s[i+1] ='D';
i+=2;
num-=400;
 }
while (num >= 100) {
s[i] ='C';
num-=100;
i++;
 }
if (num >= 90) {
s[i] ='X'; s[i+1] ='C';
i+=2;
num-=90;
 }
while (num >= 50) {
s[i] ='L';
num-=50;
i++;
 }
if (num >= 40) {
s[i] ='X'; s[i+1] ='L';
i+=2;
num-=40;
 }
while (num >= 10) {
s[i] ='X';
num-=10;
i++;
 }
if (num >= 9) {
s[i] ='I'; s[i+1] ='X';
i+=2;
num-=9;
 }
while (num >= 5) {
s[i] ='V';
num-=5;
i++;
 }
if (num >= 4) {
s[i] ='I'; s[i+1] ='V';
i+=2;
num-=4;
 }
while (num >= 1) {
s[i] ='I';
num-=1;
i++;
 }
 }
returns;
}

intmain() {
inta=2014;
intb=2015;
/* should be MMXIV */
printf("%s\n", intToRoman(a));
/* should be MMXV */
printf("%s\n", intToRoman(b));
return0;
}