Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

#define SET_MODE 1
#define CLEAR_MODE 0

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    if (mode == SET_MODE){
        reg |= (1 << pos);
    }else{
        reg &= ~(1 << pos);
    }

    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