Decimal to binary conversion

C programming code

#include <stdio.h>

int main()

{

  int n, c, k;

  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");

  return 0;

}

Output of program:

Enter an integer in decimal number system

4

4 in binary number system is

0100