Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET2_7(reg) reg | (1<<2 | 1<<7)
#define CLEAR_3(reg) reg & ~(1<<3)
#define TOGGLE_5(reg) reg ^ (1<<5)

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    reg = SET2_7(reg);
    reg = CLEAR_3(reg);
    reg = TOGGLE_5(reg);
    return reg;
}

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

Solving Approach