Bit Operations using Macros

Code

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

// Define bitwise macros here
#define set_bit(r,b)    ((r |= (1u << (b))))
#define clear_bit(r,b)  ((r &= ~(1u << (b))))
#define toggle(r,b)     ((r ^= (1u << (b))))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    // reg |= (1 << 2);
    // reg |= (1 << 7);
    // reg &= ~(1 << 3);
    // reg ^= (1 << 5);
    set_bit(reg,2);
    set_bit(reg, 7);
    clear_bit(reg, 3);
    toggle(reg,5);

    return reg;
}

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

Solving Approach

modify the registers as instructed in the same order and applied MAcros