Bit Operations using Macros

Code

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

// Define bitwise macros here
#define Set(reg,bits) ((reg)|=(1<<(bits)))
#define Clear(reg,bits) ((reg)&=~(1<<(bits)))
#define Toggle(reg,bits) ((reg)^=(1<<(bits)))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    Set(reg,2);
    Set(reg,7);
    Clear(reg,3);
    Toggle(reg,5);
    return reg;
}

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

Solving Approach