Bit Operations using Macros

Code

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

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

uint8_t modify_register(uint8_t reg) {
    set_bit(reg, 2);
    set_bit(reg, 7);
    clear_bit(reg, 3);
    toggle_bit(reg,5);

    // Apply operations in order
    return reg;
}

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

Solving Approach