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