Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET(r,pos) (r = r | (1<<pos))
#define CLEAR(r,pos) (r = r & (~(1<<pos)))
#define TOGGLE(r,pos) (r = r ^ (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