Bit Operations using Macros

Code

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

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


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