Bit Operations using Macros

Code

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

#define ts 0b10000100
#define three 0b11110111
#define five 0b00100000

uint8_t modify_register(uint8_t reg) {
    reg = reg|ts;
    reg = reg&three;
    reg = reg^five;
    return reg;
}

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

Solving Approach