1. Set or Clear a Specific Bit in a Register

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    //creating bit mask
    unsigned char BIT_MASK = (1 << pos);

    if(mode == 1){
        return reg | BIT_MASK;
    }else if(mode == 0){
        return reg & ~BIT_MASK;
    }else{
        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;
}