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
    if ((pos > 7) || ((mode > 1) || (mode < 0)))
        return 0;
    else
    {
        switch(mode)
        {
            case 0: 
                reg &= ~(1 << pos);
                break;
            case 1: 
                reg |= (1 << pos);
                break;
            default:
                // do nothing
                break;
        }
    }

    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