Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET(mask) (reg |=(mask))
#define CLEAR(mask) (reg &=~(mask))
#define TOGGLE(mask)   (reg ^=(mask))

#define BIT2 (1<<2)
#define BIT3 (1<<3)
#define BIT5 (1<<5)
#define BIT7 (1<<7)

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    SET(BIT2 | BIT7);
    CLEAR(BIT3);
    TOGGLE(BIT5);
    return reg;
}

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

Solving Approach