Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BIT reg | (1 << 2)
#define SET_BITS reg | (1 << 7)
#define CLEAR_BIT reg & ~(1 << 3)
#define TOGGLE_BIT reg ^ (1 << 5)

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    reg = SET_BIT;
    reg = SET_BITS;
    reg = CLEAR_BIT;
    reg = TOGGLE_BIT;
    return reg;
}

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

Solving Approach