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)
{
    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