Bit Operations using Macros

Code

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

// Define bitwise macros here
#define set2_and7(x) (x |= ((1 << 2) | (1 << 7)))
#define clear3(x) (x &= ~(1 << 3))
#define toggle5(x) (x ^= (1 << 5)) 

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    uint8_t res;
    res = set2_and7(reg);
    res = clear3(res);
    res = toggle5(res);
    return res;
}

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

Solving Approach