Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BIT(REG, BIT)     ((REG) |=  (1U << (BIT)))
#define CLEAR_BIT(REG, BIT)   ((REG) &= ~(1U << (BIT)))
#define TOGGLE_BIT(REG, BIT)  ((REG) ^=  (1U << (BIT)))
#define READ_BIT(REG, BIT)    (((REG) >> (BIT)) & 0x1U)

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    SET_BIT(reg, 2);
    SET_BIT(reg, 7);

    // 2. Clear bit 3
    CLEAR_BIT(reg, 3);

    // 3. Toggle bit 5
    TOGGLE_BIT(reg, 5);
    return reg;
}

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

Solving Approach