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 a;
    if(mode ==0)
    {
        //clear 
        a = reg & ~(1<<pos);
       return a;
    }
    else if(mode ==1 )
    {
        a = reg | (1<<pos);
        return a;
    }
}

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