Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BIT_2_7     (reg |= ((1<<2)|(1<<7)))
#define CLEAR_BIT_3     (reg &= ~(1<<3))
#define TOGGLE_BIT_5    (reg ^= (1<<5))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    SET_BIT_2_7;
    CLEAR_BIT_3;
    TOGGLE_BIT_5;
    return reg;
}

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

Solving Approach