Bit Operations using Macros

Code

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

// Define bitwise macros here
#define setBit(reg)     ((reg) | ((1 << 2) | (1 << 7)))
#define clearBit(reg)   ((reg) & ~(1 << 3))
#define toggleBit(reg)  ((reg) ^ (1 << 5))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    reg = setBit(reg);
    reg = clearBit(reg);
    reg = toggleBit(reg);
    return reg;
}

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

Solving Approach