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=0;

    if(mode==0){
        mask=~(1<<pos);
       reg=reg&mask;
       mask=0;

    }
    if(mode==1){
        mask=1<<pos;
        reg=reg|mask;
        mask=0;
    }
    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;
}