C++ Bit's operations

#include <stdio.h>

void bit_off(unsigned char *byte, int bit_number) {
    *byte ^= *byte &(0x80 >> bit_number);
}

void bit_on(unsigned char *byte, int bit_number) {
    *byte |= (0x80 >> bit_number);
}

void change_bit(unsigned char* byte, int bit_number) {
    *byte ^= (0x80 >> bit_number);
}

void print_bit(unsigned char *byte, int bit_number) {
    if ((0x80 >> bit_number) & (*byte))
        printf("1");
    else
        printf("0");
}

void print_byte(unsigned char *byte) {
    for (int i = 0; i < 8; i++)
        if ((0x80 >> i) & (*byte))
            printf("1");
        else
            printf("0");
}

int main() {
    unsigned char byte = 'a';
    int n1, n2, n3, n4;
    printf("Enter the bit's numbers [0..7]: ");
    scanf("%d %d %d %d", &n1, &n2, &n3, &n4);
    // n1 - погасить, n2 - включить, n3 - изменить, n4 - вывести
    printf("\nOriginal byte: ");
    print_byte(&byte);
    bit_off(&byte, n1);
    printf("\nBit %d is off: ", n1);
    print_byte(&byte);
    bit_on(&byte, n2);
    printf("\nBit %d is on: ", n2);
    print_byte(&byte);
    change_bit(&byte, n3);
    printf("\nBit %d was changed: ", n3);
    print_byte(&byte);
    printf("\nBit %d = ", n4);
    print_bit(&byte, n4);
}