Bit Operations using Macros

Code

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

#define SET_BIT(reg , pos) (reg |= (1 << pos))
#define CLEAR_BIT(reg , pos) (reg &= ~(1 << pos))
#define TOGGLE_BIT(reg , pos) (reg ^= (1 << pos))

uint8_t modify_register(uint8_t reg) {
    SET_BIT(reg , 2);
    SET_BIT(reg , 7 );
    CLEAR_BIT(reg , 3);
    TOGGLE_BIT(reg , 5);
    return reg;
}

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

Solving Approach