1. Set or Clear a Specific Bit in a Register

#include <stdio.h>
#include <math.h>
unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    return (int)reg - pow(2, pos) + mode * pow(2, pos);
}

int main() {
    unsigned char reg;
    int pos, mode;
    scanf("%hhu %d %d", &reg, &pos, &mode);
    printf("%d", modifyBit(reg, pos, mode));
    return 0;
}