Bit Operations using Macros

Code

#include <stdio.h>
#include <stdint.h>

// Marco
#define BV(bit)                 (1 << bit)
#define setBit(byte, bit)       (byte |= BV(bit))
#define clearBit(byte, bit)     (byte &= ~BV(bit))
#define toggleBit(byte, bit)    (byte ^= BV(bit))

uint8_t modify_register(uint8_t reg) {
    reg = setBit(reg, 2);
    reg = setBit(reg, 7);
    reg = clearBit(reg, 3);
    reg = toggleBit(reg, 5);
    return reg;
}

int main() {
    uint8_t reg;
    scanf("%hhu", &reg);
    printf("%u", modify_register(reg));
    return 0;
}

Solving Approach