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 bit = 0b00000001;
    if( mode == 0 )
    {
        bit= bit << pos;
        return reg &= (~bit);
    }
    else if (mode == 1)
    {
        bit= bit << pos;
        return reg |= bit;
    }
}

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