Bit Operations using Macros

Code

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

// Define bitwise macros here
#define setbits(reg) ((reg)|(0x84))
#define clearbit_3(reg) ((reg) & ~(1<<3))
#define togglebit_5(reg) ((reg) ^ (1<<5))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
   reg = setbits(reg);
   reg=  clearbit_3(reg);
   reg=  togglebit_5(reg);
    return reg;
}

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

Solving Approach