decimal to binary Algorithm
In computing and electronic systems, binary-coded decimal (BCD) is a class of binary encodings of decimal numbers where each decimal digit is represented by a fixed number of bits, normally four or eight. In byte-oriented systems (i.e. most modern computers), the term unpacked BCD normally imply a full byte for each digit (often including a sign), whereas packed BCD typically encodes two decimal digits within a individual byte by take advantage of the fact that four bits are enough to represent the range 0 to 9.
#include <stdio.h>
#include <stdlib.h>
#define MAXBITS 100
int main()
{
// input of the user
int inputNumber;
// for the remainder
int re;
// contains the bits 0/1
int bits[MAXBITS];
// for the loops
int j;
int i=0;
printf("\t\tConverter decimal --> binary\n\n");
// reads a decimal number from the user.
printf("\nenter a positive integer number: ");
scanf("%d",&inputNumber);
// make sure the input number is a positive integer.
if (inputNumber < 0)
{
printf("only positive integers >= 0\n");
return 1;
}
// actual processing
while(inputNumber>0)
{
// computes the remainder by modulo 2
re = inputNumber % 2;
// computes the quotient of division by 2
inputNumber = inputNumber / 2;
bits[i] = re;
i++;
}
printf("\n the number in binary is: ");
// iterates backwards over all bits
for(j=i-1; j>=0; j--)
{
printf("%d",bits[j]);
}
// for the case the input number is 0
if (i == 0)
{
printf("0");
}
return 0;
}
