将“ struct sockaddr_in”传递给方法

Question

How can I pass struct sockaddr_in z to a my method?

void method(?);

int main(void){
struct sockaddr_in z;
...
}

void method(?){
....
}

What goes in place of "?"?

Thank you very much!

Answer 1

With a pointer, like this:

void method(struct sockaddr_in *z);

int main(void){
    struct sockaddr_in z;
    z.sin_port = 4242;
    method(&z);
}

void method(struct sockaddr_in *z){
    printf("%i\n", z->sin_port);
}

Answer 2

Passing a struct by value is perfectly legal in C:

void func(struct sockaddr_in z);

int main(void)
{
    struct sockaddr_in z = {0};

    func(z);
}

void func(struct sockaddr_in z)
{
    printf("%d\n", z.sin_port);
}