Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    unsigned char mask;
    mask = (1 << pos);
    if (mode == 1)
    {
        reg = reg | mask;
    }
    else
    {
        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;
}

Solving Approach

Created a masking variable for setting and clearing the reg variable bit by ORing and Anding operation.