Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET(X,N)  (X |=(1 << N))
#define CLEAR(X,N)  (X &= ~(1 << N))
#define TOGGLE(X,N)  (X ^= (1 << N))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    SET (reg,2);
    SET (reg,7);
    CLEAR (reg,3);
    TOGGLE (reg,5);
    return reg;
}

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

Solving Approach