1. Set or Clear a Specific Bit in a Register

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    unsigned char mask = 1 << pos;
    if(mode == 1) {
        reg = reg | mask;
    }
    else if(mode == 0) {
        unsigned char cleared_mask = ~mask;
        reg = reg & cleared_mask;
    }
    return reg;   // Write your code here
}

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