Decimal to binary conversion

#include <stdio.h>
 
int main()
{
  int n, c, k;
 
  printf("\nEnter an integer in decimal number system ::");

  scanf("%d", &n);
 
  printf("\n%d in binary number system is ::", n);
 
  for (c = 31; c >= 0; c--)
  {
    k = n >> c;
 
    if (k & 1)
      printf("1");
    else
      printf("0");
  }
 
  printf("\n");
 
  return 0;
}

/*

Output :

 Enter an integer in decimal number system :: 5

 5 in binary number system is :: 101
*/