1. Set or Clear a Specific Bit in a Register

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    int bitToMod = 1 << pos;
    int modifiedReg;

    if (mode == 0) {
        modifiedReg = reg & ~(bitToMod);
    }

    else {
        modifiedReg = reg | bitToMod;
    }

    return modifiedReg;
}

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