Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BITS(reg) reg |=   0b10000100
#define RESET_BITS(reg) int val1 = (reg & 0b00001000) != 0; if (val1) {reg ^= 0b00001000;}
#define TOGGLE_BIT(reg) int val2 = (reg & 0b00100000) != 0; if (val2) {reg ^= 0b00100000;} else {reg |= 0b00100000;}

uint8_t modify_register(uint8_t reg) {
    SET_BITS(reg);
    RESET_BITS(reg);
    TOGGLE_BIT(reg);
    return reg;
}

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

Solving Approach