#include <iostream>
#include <memory>
#include <string>
#include <cstring>
using namespace std;

void FlipBit(char & c, int i)
{
    c ^= (1 << i);
}

int main()
{
    char c = 0b00001111;
    printf("%b\n", c);
    FlipBit(c, 2);
    printf("%b\n", c);
    for (int i = 0; i < 2; i++)
    {
        for (int j = 0; j < 2; j++)
        {
            printf("%b ^ %b = %b\n", i, j, i ^ j);
        }
        
    }
    int i = 0b1111;
    int j = 1 << 2;
    printf("%b ^ %b = %b\n", i, j, i^j);
    
    return 0;
}