a struct in a function parameters

ive started to learn c++ for halflife modding , and ive come across something which is puzzling me .

void NET_CALLBACK ListResponse( struct net_response_s *response );

now have can you have a function like this
with 2 function names plus saying struct in the parameters..
and ive seen struct within a class..all this is new to me
and the programmers of this mod sdk was able to use
CHudServers *g_pServers; /////////////// -> on its members without
making CHudServers *g_pServers = new Chudservers...
can someone clear some of this up :P

Quote:

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Originally Posted by Anddos

ive started to learn c++ for halflife modding , and ive come across something which is puzzling me .

void NET_CALLBACK ListResponse( struct net_response_s *response );

now have can you have a function like this
with 2 function names plus saying struct in the parameters..

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NET_CALLBACK is the calling convention, I havn't come accross this one in particular but it tells the compiler how to call the function. ListResponse is the name of the function.

Quote:

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and ive seen struct within a class..all this is new to me
and the programmers of this mod sdk was able to use
CHudServers *g_pServers; /////////////// -> on its members without
making CHudServers *g_pServers = new Chudservers...
can someone clear some of this up :P

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If your function is passed a pointer to a structure then it should have allready been created somewhere else so you don't need to call new to create another structure. the -> operator dereferences the pointer allowing you to acces it's members.

well its done #define NET_CALLBACK

then used the NET_CALLBACK for the function names
is it sort of grouping the functions to a catagory

Quote:

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now have can you have a function like this
with 2 function names plus saying struct in the parameters..

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translation: How can you use the keyword "struct" in a function parameter?

Code:

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#include <iostream>
using namespace std;

struct Data
{
        int num1;
        int num2;
};

void show(struct Data* ptr)
{
        cout<<"Data:\n"
            <<ptr->num1<<endl
            <<ptr->num2<<endl;
}
int main()
{
        struct Data myData;
        myData.num1 = 20;
        myData.num2 = 30;

        show(&myData);
       
        return 0;
}

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The code:

Code:

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ptr->num1

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is shorthand for:

Code:

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(*ptr).num1

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In C++ the struct keyword is optional everywhere except the original definition.

Code:

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#include <iostream>
using namespace std;

struct Data
{
        int num1;
        int num2;
};

void show(struct Data* ptr)
{
        cout<<"Data:\n"
            <<ptr->num1<<endl
            <<ptr->num2<<endl;
}
int main()
{
        struct Data myData;
        myData.num1 = 20;
        myData.num2 = 30;

        show(&myData);
       
        return 0;
}

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blue = optional