Bit Operations using Macros

Code

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

// Define bitwise macros here
#define clear_bit_3 (reg &= ~(1<<3))
#define set_bit_2_7 (reg |= (0x84))
#define toggle_bit_5 (reg ^= (1<<5))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    clear_bit_3;
    set_bit_2_7;
    toggle_bit_5;
    return reg;
}

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

Solving Approach