Program to convert any given year into its roman equivalent by Function.

#include
main()
{
int year;
int convert (int year);

{

printf("Note:Enter a four year digit year.\n\n");
printf("Enter the year that you wanna convert to Roman: " );
scanf ("%d", &year);
if (year> 1999)

{
printf("Invalid Year.Please enter again.\n\n");
}
}

convert(year);
}


convert(int year)
{
int i;
printf("\nYear converted to Roman:");

i=(year/1000); //thousands place
if(i==1)
{
printf("m");
}
i=((year/100)%10); //hundreds place
switch (i)
{
case 1:
printf("c");

break;

case 2:
printf("cc");

break;

case 3:
printf("ccc");

break;

case 4:
printf("cd");

break;

case 5:
printf("d");

break;

case 6:
printf("dc");

break;

case 7:
printf("dcc");

break;

case 8:
printf("dccc");

break;

case 9:
printf("dcccc"); //this part you may think is wrong..9 -> cm

break; //but i have taken a hint from the example in the question.

}



i=((year/10)%10); //tens place

switch(i)
{
case 1:
printf("x");

break;

case 2:
printf("xx");

break;

case 3:
printf("xxx");

break;

case 4:
printf("xl");

break;

case 5:
printf("l");

break;

case 6:
printf("lx");

break;

case 7:
printf("lxx");

break;

case 8:
printf("lxxx");

break;

case 9:
printf("lxxxx"); //had it not been for this example, it would have been xc
break;
}



i=year%10; //ones place

switch(i)
{
case 1:
printf("i");
break;

case 2:
printf("ii");
break;

case 3:
printf("iii");
break;

case 4:
printf("iv");
break;

case 5:
printf("v");
break;

case 6:
printf("vi");
break;

case 7:
printf("vii");
break;

case 8:
printf("viii");
break;

case 9:
printf("ix");
break;
}
printf ("\n\n");
return 0;
}

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