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
    int mask = (1 << pos);
    int mask1 = ~(1 << pos);
    if(mode == 1)
    {
    int res = reg | mask;
    return res;
    }
    else if(mode == 0)
    {
        int res1 = reg & mask1;
        return res1;
    }
}

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