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)
    {
        reg= reg | (1<<pos);
    }
    if(mode==0)
    {
        unsigned char mask;
        mask = ~ (1<<pos);
        reg = reg & mask;
    }
    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;
}