Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET(byte,nbit) (byte|=(1<<nbit))
#define CLEAR3(byte) (byte&=~(1<<3));
#define TOGGLE5(byte) (byte^=(1<<5));

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    SET(reg,2);
    SET(reg,7);
    CLEAR3(reg);
    TOGGLE5(reg);
    return reg;
}

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

Solving Approach