Bit Operations using Macros

Code

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

// Define bitwise macros here
#define BIT_SET(X)    X |=  (1U<<2U|1U<<7U)
#define BIT_CLEAR(X)  X &= ~(1U<<3U)
#define BIT_TOGGLE(X) X ^=  (1U<<5U)

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    BIT_SET(reg);
    BIT_CLEAR(reg);
    BIT_TOGGLE(reg);
    return reg;
}

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

Solving Approach