Bit Operations using Macros

Code

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

// Define bitwise macros here
#define setbit(reg,bit) ((reg)|=(1<<bit))
#define clearbit(reg,bit) ((reg)&=~(1<<bit))
#define togglebit(reg,bit) ((reg)^=(1<<bit))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    setbit(reg,2);
    setbit(reg,7);
    clearbit(reg,3);
    togglebit(reg,5);
    return reg;
}

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

Solving Approach