Bit Operations using Macros

Code

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

// Bitwise macros
#define SET_BIT(num, pos)     ((num) |= (1U << (pos)))   // set bit
#define CLEAR_BIT(num, pos)   ((num) &= ~(1U << (pos)))  // clear bit
#define TOGGLE_BIT(num, pos)  ((num) ^= (1U << (pos)))   // toggle bit

uint8_t modify_register(uint8_t reg) {
    // Apply operations in given order
    SET_BIT(reg, 2);     // Set bit 2
    SET_BIT(reg, 7);     // Set bit 7
    CLEAR_BIT(reg, 3);   // Clear bit 3
    TOGGLE_BIT(reg, 5);  // Toggle bit 5
    return reg;
}

int main() {
    uint8_t reg;
    scanf("%hhu", &reg);

    uint8_t result = modify_register(reg);
    printf("%u\n", result);
    return 0;
}

Solving Approach