Passing two different structs into same function

Question

I have 2 different sized structs and I would like to have one function in which I can pass them into. However, I do not know how to define the parameter of the function to

Answer 1

typedef struct p1 {
    int a;             // 2 byte
    int b;             // 2 byte
    int c;             // 2 byte
    int d;             // 2 byte
} person1;                // 8 bytes


typedef struct p2{
    int a;            // 2 byte
    DeviceAddress b;  // 8 bytes
    int c             // 2 bytes
    float d;      // 4 bytes
} person2;               // 16 bytes

typedef enum ptypes {
    PERSON1,
    PERSON2
} person_type;

typedef union p1_or_p2 {
    person1 p1;
    person2 p2;
} person1_or_person2;

typedef struct p {
    person1_or_person2 person;
    person_type type;
} person;

// Creating a person struct variable:
person p;
person1 p1;
p1.a = 5;
p1.b = 2;
p.type = PERSON1;
p.person = (person1_or_person2) p1;

void print_struct(person p) {
     switch (p.type) {
        case PERSON1:
            // actions for person1 here....
              // you can access person1 like this:
                 p.person.p1;
        break;
        case PERSON2:
            // actions for person2 here....
              // you can access person2 like this:
                 p.person.p2;
        break;
     }
}