Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BIT(reg, pos) (reg |= (1U << pos))
#define CLEAR_BIT(reg, pos) (reg &= ~(1U << pos))
#define TOGGLE_BIT(reg, pos) (reg ^= (1U << pos))
#define MODIFY_REG(reg) ( \
        SET_BIT(reg, 2),    \
        SET_BIT(reg, 7),    \
        CLEAR_BIT(reg, 3),  \
        TOGGLE_BIT(reg, 5), \
        (reg) )

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    return MODIFY_REG(reg);
}

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

Solving Approach