1. Set or Clear a Specific Bit in a Register

#include <stdio.h>
#define SET 1
#define CLEAR 0
unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    if(mode == CLEAR)
    {
        reg &= ~(1<<pos);
        return reg;
    }
    else if(mode == SET)
    {
        reg |= (1<<pos);
        return reg;
    }
    else{
        return 0;
    }
    return 0;
}

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