Writing addition program w/o using arithmetic operators

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How can i write a simple C/C++ Program that prints the sum of two integers without using arithmetic Operator i.e. a+b.

Posted 31-Jan-14 22:23pm

Shah Parth P

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Richard MacCutchan 1-Feb-14 4:28am

You can't; it's not a simple problem.

[no name] 1-Feb-14 5:28am

Google "addition without using +" please.

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Abhinav S · Answer 1 · 2014-01-31T22:25:00

Solution 1

This looks like homework.
Hint is think about using bitwise operators.

Posted 31-Jan-14 22:25pm

Abhinav S

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Shah Parth P 1-Feb-14 4:27am

Not a Homework.
was just thinking that is it possible or not?
and if yes then how?

Abhinav S 1-Feb-14 4:28am

Its possible using bit level instructions.

enhzflep 1-Feb-14 4:51am

The fact that the question is "How can I...", rather than "Can I ..." gives the impression that you've been told it's possible but don't have an idea of how to go about it.

Hint: Look into ALUs - these are the hardware units inside the CPU which perform the steps required to implement the add and sub (and other arithmetic) instructions.
Arithmetic logic unit (ALU) - wikipedia

Particularly, look into the adder circuit. (3rd link of the 'See also' section)