Bit Operations using Macros

Code

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

#define MODIFY_REGISTER(a) \
    (((a | 0b10000100) & 0b11110111) ^ 0b00100000)

/* uint8_t modify_register(uint8_t reg) {
    reg |= 0b10000100;
    reg &= 0b11110111;
    reg ^= 0b00100000;
    return reg;
}
*/

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

Solving Approach