Decimal to binary conversion using C

#include <stdio.h>
main()
{
  int n, c, k;
  printf("\n(There is) none worthy of worship except Allah(Subhanahu wa ta'ala).Muhammad(Sallallahu alayhi wasallam) is Messenger of ALLAH(Subhanahu wa ta'ala).\n");
  printf("Enter an integer in decimal number system\n");
  scanf("%d", &n);
  printf("%d in binary number system is:\n", n);
  for (c = 31; c >= 0; c--)
  {
    k = n >> c;
    if (k & 1)
      printf("1");
    else
      printf("0");
  }
  printf("\n");
}