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 mask =1;
    if(mode==1){
    
    reg = reg | (mask << pos);}
    else{
    unsigned char mask_inv;
    mask_inv = mask << pos;
    
    reg = reg & (~mask_inv);}
    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;
}