Write a C program to calculate Binary Addition and Binary Subtraction

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Binary addition

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Binary Addition works in the same way, except that only 0’s and 1’s can be used, instead of the whole spectrum of 0-9. This actually makes binary addition much simpler than decimal addition, as we only need to remember the following:

In binary addition

0+0 = 0
0+1 = 1
1+0 = 1
1+1 = 0 (1 carries out)

Example of Binary Addition:

Take two numbers, suppose numbers are 10 and 20 their binaries are 1010 and 10100.

Now add 10 and 20

10 = 0 1 0 1 0
20 = 1 0 1 0 0
= 1 1 1 1 0
= 30

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Binary Subtraction

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Subtraction and Borrow, these two words will be used very frequently for the binary subtraction. There are four rules of binary subtraction.

In binary subtraction

0-0 = 0
1-0 = 1
0-1 = 1 (1 borrows out)
1-1 = 0

Example of Binary Subtraction:

Take two numbers, suppose numbers are 20 and 10 their binaries 10100 and 1010.

Now sub 10 from 20

20 = 1 0 1 0 0
10 = 0 1 0 1 0
= 0 1 0 1 0
= 10

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SOURCE CODE : :

#include <stdio.h>

//--------function for Binary Addition--------

int binAddition(int a,int b)
{
      int c; //carry
      while (b != 0) {
              //find carry and shift it left
              c = (a & b) << 1;
              //find the sum
              a=a^b;
              b=c;
      }
      return a;
}

//-------Function for Binary Subtraction--------

int binSubtracton(int a, int b)
{
      int carry;
      //get 2's compliment of b and add in a
      b = binAddition(~b, 1);

      while (b != 0) {
              //find carry and shift it left
              carry = (a & b) << 1;
              //find the sum
              a = a ^ b;
              b = carry;
      }
      return a;
}


int main()
{
    int number1,number2, binAdd, binSub;

    printf("Input first integer value: ");
    scanf("%d",&number1);

    printf("Input second integer value: ");
    scanf("%d",&number2);

    binAdd=binAddition(number1,number2);
    binSub=binSubtracton(number1,number2);

    printf("Binary Addition: %d\n",binAdd);
    printf("Binary Subtraction: %d\n",binSub);

    return 0;

}

Output : :

Input first integer value: 12
    Input second integer value: 5
    Binary Addition: 17
    Binary Subtraction: 7

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