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
    if(mode == 1) //set
    {
        reg |= (1 << pos);     // Set bit n
    }
    else if(mode == 0) //clear
    {
        reg &= ~(1 << pos);    // Clear bit n
    }

    return reg;
}

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