Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

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

                            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