Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

#define CLEAR 0
#define SET 1

unsigned char modifyBit(unsigned char reg, int pos, int mode) 
{
    switch (mode)
    {
        case CLEAR:
        {
            reg &= ~(1 << pos);
            break;
        }

        case SET:
        {
            reg |= (1 << pos);
            break;
        }

        default: 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