Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BITS_2_AND_7(reg)    reg | (0x84)
#define CLEAR_BIT_3(reg)         reg & 0xF7
#define TOGGLE_BIT_5(reg)        reg ^ 0x20

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    reg = SET_BITS_2_AND_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