SPLASH MY WORLD

So this is the  code how to convert the Roman Numeral. I got from the book I learn about :)

	#include<stdio.h>
	main ()
	{
	int year;
	printf("Ente years from 1 to 3999: ");
	scanf("%d", &year);
	if(year < 1 || year > 3999)
	printf("year in 1 to 3999 years range");
	else
	{
	while (year>= 1000)
	{
	printf("M");
	year = year - 1000;
	if (year>= 500)
	{
	if (year>= 900)
	{
	printf("CM");
	year = year - 900;
	}
	else
	{
	printf("D");
	year = year - 500;
	}
	}
	while (year>= 100)
	{
	if (year>= 400)
	{
	printf("CD");
	year = year - 400;
	}
	else
	{
	printf("C");
	year = year - 500;
	}
	}
	if (year>= 50)
	{
	if (year>= 90)
	{
	printf("XC");
	year = year - 90;
	}
	else
	{
	printf("L");
	year = year - 50;
	}
	}
	while(year>=10)
	{
	if (year>= 40)
	{
	printf("XL");
	year = year - 40;
	}
	else
	{
	printf("X");
	year = year - 10;
	}
	}
	if (year>=5)
	{
	if (year == 9)
	{
	printf("IX");
	year = year - 9;
	}
	else
	{
	printf("V");
	year = year - 5;
	}
	}
	while(year>=1)
	{
	if (year==4)
	{
	printf("IV");
	year = year - 4;
	}
	else
	{
	printf("I");
	year = year - 1;
	}
	}
	}
	printf("\n");
	}
	}

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