Bit Operations using Macros

Code

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

// Define bitwise macros here
#define set(reg, index) ((reg) | (1 << (index)))
#define clear(reg, index) ((reg) & ~(1 << (index)))
#define toggle(reg, index) ((reg) ^ (1 << (index)))

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

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

Solving Approach