Bit Operations using Macros

Code

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

// Define bitwise macros here
#define BIT(n) (1 << n)

#define SETBIT(r, n) r |= BIT(n)
#define CLRBIT(r, n) r &= ~BIT(n)
#define TGLBIT(r, n) r ^= BIT(n)

uint8_t modify_register(uint8_t reg) {
    SETBIT(reg, 2);
    SETBIT(reg, 7);
    CLRBIT(reg, 3);
    TGLBIT(reg, 5);
    return reg;
}

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

Solving Approach