Bit Operations using Macros

Code

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

#define SET_BIT(REG, POS)       (REG |= (1U<<POS));
#define CLEAR_BIT(REG, POS)     (REG &= ~(1U<<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