Bit Operations using Macros

Code

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

// Define bitwise macros here

#define SET(r) (r | (1 << 2) | (1 << 7))
#define CLR(r) (r & ~(1 << 3))
#define TGL(r) (r ^ (1 << 5))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    reg = SET(reg);
    reg = CLR(reg);
    reg = TGL(reg);
    return reg;
}

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

Solving Approach