Roman

#include <stdio.h>
#include <math.h>
void showroman(int a);
int main()
{
    int number;
    printf("Enter Your Number : ");
    scanf("%d",&number);
    printf("\n\nResult is : ");
    showroman(number);
    return 0;
}
void showroman(int a) {
    int c,b;
    char *roman[4][10]={
         {"","I","II","III","IV","V","VI","VII","VIII","IX"},
         {"","X","XX","XXX","XL","L","LX","LXX","LXXX","XC"},
         {"","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"},
         {"","M","MM","MMM"}
            };
    for (c=3;c>=0;c--){
         b=(a/(int)pow(10,c))%10;
         printf("%s",roman[c][b]);
    }
    return;
}