Bit Operations using Macros

Code

#include <stdio.h>
#include <stdint.h>
// Define bitwise macros here
#define set(reg,pos) ((reg) |= (1 << (pos)))
#define clear(reg,pos) ((reg) &= ~(1 << (pos)))
#define toggle(reg,pos) ((reg) ^= (1 << (pos)))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    set(reg,2);
    set(reg,7);
    clear(reg,3);
    toggle(reg,5);
    return (uint8_t)reg;
}

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

Solving Approach