Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BIT(r, b) ((r) |= (1 << (b)))
#define CLR_BIT(r, b) ((r) &= ~(1 << (b)))
#define TOG_BIT(r, b) ((r) ^= (1 << (b)))


uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    //reg |= (1 << 2);     // Set bit 2
    //reg |= (1 << 7);     // Set bit 7
    //reg &= ~(1 << 3);    // Clear bit 3
    //reg ^= (1 << 5);     // Toggle bit 5
    SET_BIT(reg, 2); // Set bit 2
    SET_BIT(reg, 7); // Set bit 7
    CLR_BIT(reg, 3); // Clear but 3
    TOG_BIT(reg, 5); // Toggle bit 5
    return reg;
}

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

Solving Approach