Bit Operations using Macros

Code

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

// Define bitwise macros here
#define BITSET(r) (r | 132)
#define BITCLEAR(r) (r & ~(1<<3))
#define BITTOGGLE(r) (r ^ (1<<5))

uint8_t modify_register(uint8_t reg) {
    reg=BITSET(reg);
    reg=BITCLEAR(reg);
    reg=BITTOGGLE(reg);
    // Apply operations in order
    return reg;
}

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

Solving Approach