OneBitMultiplier UAB MOOC

#include <iostream>
#include <cmath>
#include <bits/stdc++.h>
using namespace std;

#define N 7
#define M 7
typedef bitset<8> BYTE;
typedef bitset<1> BIT;

struct next_x {BIT next_a ;BIT next_c;};

bool OnebitMultiplier (bool a, bool x, bool y ,bool  c , bool next_a ,bool next_c){

    next_c = ( a & c ) | ( a & ( x & y)) | (c & (x & y));
    next_a = a ^ (x & y) ^ c;
    return a;
}



int main (){

    BYTE X(1);
    BYTE Y(2);
    BYTE acc(0);
    bool carry(false),next_a(false),next_c(false);

    size_t i(1),j(1);


    for (i=1 ; i<= pow (2,N) ; i<<=1){
        for (j=1;j<= pow (2,M);j<<=1){

        acc|=OnebitMultiplier( acc [i|j ],X[j],Y[i],& carry, & next_a, & next_c) ;

        }

    }

 cout <<X<< " * "<<Y<< " = "<< acc<<endl;
return 0;
}