Bit Operations using Macros

Code

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

// Define bitwise macros here
#define set_bit(n,k) n|= (1U << k)
#define clear_bit(n,k) n &= ~(1U << k)
#define toggle_bit(n,k) n ^= (1U << k)

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    set_bit(reg,2);
    set_bit(reg,7);
    clear_bit(reg,3);
    toggle_bit(reg,5);
    return reg;
}

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

Solving Approach