Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BITS_2_7(REG) (((1U << 2) | (1U << 7)) | REG) 
#define CLEAR_BIT_3(REG) (~(1U << 3) & REG)
#define TOGGLE_BIT_5(REG) ((1U << 5) ^ REG)

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    reg = SET_BITS_2_7(reg);
    reg = CLEAR_BIT_3(reg);
    reg = TOGGLE_BIT_5(reg);
    return reg;
}

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

Solving Approach