Bit Operations using Macros

Code

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

// Define bitwise macros here

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order

    int mask = 0b10000100;
    reg |= mask;

    mask = 0b11110111;
    reg &= mask;

    mask = (1 << 5);
    if (mask & reg) {
        reg &= ~mask;
    } else {
        reg |= mask;
    }

    return reg;
}

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

Solving Approach