how to write a program for half adder in C++?

Question

For example:

Infix      Postfix 
------     -------- 
a+b          ab+ 
(a+b)*c      ab+c* 
a+b*c        abc*+ 
a*(b+c)-d/e  abc+*de/-

Answer 1

a and b must be bits....i.e 0 and/or 1

void halfadder(int a, int b)
{
    carry=a*b
    sum=a *  ~b + b * ~a    // or use a ^ b
}

void fulladder(int a, int b ,int carryin)
{
    carryout=a * b+b * carryin+ a * carryin
    sum=  a ^ b ^ c     
    // you can convert into sop form 
}