Dec_To_Bin_Efficent.c

//Decimal to Binary Conversion Efficent.
//using Bitwise AND and RightShift operators to achieve maximum efficeny.
//Written by HaseeB Mir (haseebmir.hm@gmail.com)
//Dated : 25/02/2017

#include<stdio.h>

#define BYTE  8
#define WORD  16
#define DWORD 32
#define QWORD 64

int main()
{

 long long num; //Long DataType to store big numbers.
    int bits; //No. of Bits to represent

    printf("Enter Decimal Number : ");
    scanf("%ld",&num);

    printf("Enter No. of Bits to represent : ");
    scanf("%d",&bits);

    //Rounding bits according to BYTE,WORD etc (MAX 64bit representation).

    (bits <= BYTE) ? bits = BYTE : (bits > BYTE && bits <= WORD) ? bits = WORD:
    (bits > WORD && bits <= DWORD) ? bits = DWORD : (bits > DWORD && bits <= QWORD) ? bits = QWORD :
    (bits > QWORD) ? bits = QWORD : bits;

    printf("\nBits = %d\n",bits);

    printf("Binary : \t");
    for (bits = bits - 1; bits >= 0; bits--)
 printf("%d",( (num >> bits) & 1));


printf("\n");
return 0;
}