1. Set or Clear a Specific Bit in a Register

#include <stdio.h>
#include <stdint.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    unsigned char new_reg = reg;
    uint8_t mask = (1 << pos);
    if (mode) { // set
        new_reg |= mask;
    } else { // clear
        new_reg &= (~mask);
    }
    return new_reg;

}

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