Bit Operations using Macros

Code

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

// Define bitwise macros here
#define setbit2     (1 << 2)
#define setbit7     (1 << 7)
#define setbit3     (1 << 3)
#define setbit5     (1 << 5)

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    if (reg & (1 << 5)){
        reg = (reg | setbit2 |setbit7 ) & ~(setbit3 | setbit5) ;
    } else reg = (reg | setbit2 |setbit7  | setbit5) & ~(setbit3) ;
    return reg;
}

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

Solving Approach