convert decimal to binary / octal / hexadecimal

/* Program for convert decimal to binary / octal / hexadecimal */

#include <stdio.h>

#include <conio.h>

void main()

{

long n;

int i=0,a[20],b;

clrscr();

printf("\n Enter a decimal value: ");

scanf("%ld", &n);

printf("\n Enter base value (2, 8, 16): ");

scanf("%d", &b);

while(n!=0)

{

a[i] = n % b;

n = n/b;

i++;

}

if(b==2) {

printf("\n After conversion binary value: ");

}

else if(b==8) {

printf("\n After conversion octal value: ");

}

else {

printf("\n After conversion hexadecimal value: ");

}

for(i=i-1;i>=0;i--)

printf("%d",a[i]);

getch();

}