Bit Operations using Macros

Code

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

// Define bitwise macros here
#define modify_register(reg)(\
        (reg) |= 1<<2 | 1<<7,\
        (reg) &= ~(1<<3),\
        (reg) ^= (1<<5),\
        (reg)\
)

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

Solving Approach