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 mod_reg;
    if(!mode) {
        mod_reg = reg&(~(1<<pos));
    }
    else {
        mod_reg = reg|(1<<pos);
    }
    return mod_reg;
}

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