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
    unsigned char mask;
    //mask = reg;
    mask = mode << pos;
    if (mode ==1)
    {
      reg = reg | mask;
    }
    else if (mode ==0)
    {
      mask = 1<<pos;
      reg = reg & ~mask;
    }
    return reg;
}

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