Conversion of Year in Roman Numerals

Decimal 1  5  10  50  100  500  1000
Roman   i  v  x   l   c    d    m

Roman equivalent of 1988 is mdccclxxxviii.
Roman equivalent of 1525 is mdxxv.

#include<stdio.h>
#include<conio.h>


int main(){
    clrscr();
    int yr,i,j=0;
    char roman[20];

    printf("Enter Year : ");
    scanf("%d",&yr);

    if(yr/1000>=0)
    {
        for(i=0;i<(yr/1000);i++)
        {
            roman[j]='m';
            j++;
        }
    yr = yr - (i+1)*1000;
    }
    if(yr/500>=0)
    {
        for(i=0;i<(yr/500);i++)
        {
            roman[j]='d';
            j++;
        }
    yr = yr - (i+1)*500;
    }
    if(yr/100>=0)
    {
        for(i=0;i<(yr/100);i++)
        {
            roman[j]='c';
            j++;
        }
    yr = yr - (i+1)*100;
    }
    if(yr/50>=0)
    {
        for(i=0;i<(yr/50);i++)
        {
            roman[j]='l';
            j++;
        }
     yr = yr - (i+1)*50;
    }
    if(yr/10>=0)
    {
        for(i=0;i<(yr/10);i++)
        {
            roman[j]='x';
            j++;
        }
    yr = yr - (i+1)*10;
    }
    if(yr/5>=0)
    {
        for(i=0;i<(yr/5);i++)
        {
            roman[j]='v';
            j++;
        }
    yr = yr - (i+1)*5;
    }
    if(yr/1>=0)
    {
        for(i=0;i<(yr/1);i++)
        {
            roman[j]='i';
            j++;
        }
    }
    printf("year in roman : ");
    for(i=0;i<=j;i++)
        printf("%c",roman[i]);
getch();
  }