Sea of Tranquility

I like talking about sci-fi, space, robotics, linux, anti-fascism and democratic socialism. 🇩🇪☮️

(SeaOfTranquility on libera.chat)

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  • 14 Comments
Joined 1 year ago
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Cake day: June 14th, 2023

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  • This sounds a bit like hamster simulator, which we used in high school in our “programming” class, the site is in German, but you might the idea. But I can absolutely see how you can make this more compelling.

    Deutsch wäre jetzt kein Problem für mich und ich glaube, ich erinnere mich sogar daran, das auch mal im IT Unterricht gehabt zu haben. Leider war die Lehrerin damals 'ne Katastrophe und ich hab’ das meiste von damals wohl schon ausgeblendet 😅









  • There are a many approaches to implementing OOP in C. Since C doesn’t give you any language constructs to implement this out of the box, it’s up to you to do it in a consistent and understandable manner. Since there is no definite way to do it, let me just give you an example of how I would translate a Python file, and you can decide how you implement it from there:

    --------------
    class Parent:
        def __init__(self, param1: str, param2: int):
            self.__param1 = param1
            self.__param2 = param2
        def __private_method(self):
            print("private method")
        def public_method(self):
            print("public method")
        @staticmethod
        def static_method():
            print("static method")
        @property
        def param1(self):
            return self.__param1
    
    class Child(Parent):
        def __init__(self):
            super().__init__("param1", 2)
    --------------
    

    I would split the C code for this into header and source files:

    (header.h)

    --------------
    #pragma once
    
    /// Parent Class ///
    typedef struct Parent_obj {
        char* param1
        unsigned int param1_len
        int param2
    } Parent_obj_t;
    void Parent_init(Parent_obj_t* self, char* param1, unsigned int param1_len, int param2);
    void Parent_public_method(Parent_obj_t* self);
    void Parent_static_method();
    void Parent_param1(Parent_obj_t* self, char* out, unsigned int max_len); // property method with upper bound string length
    void Parent_del(Parent_obj_t* self); // destruct object (similar to __del__() in python)
    
    /// Child Class ///
    typedef struct Child_obj {
        Parent_hidden_state_t* super
        char* param
        unsigned int param_len
    } Child_obj_t
    void Child_init(Child_obj_t* self, Parent_obj_t* super);
    void Child_del(Child_obj_t* self);
    --------------
    

    (source.c)

    --------------
    #include "header.h"
    
    /// Parent Class ///
    // private methods
    void Parent_private_method(Parent_obj_t* self){...} // not visible in the header file
    // public methods
    void Parent_init(Parent_obj_t* self, char* param1, unsigned int param1_len, int param2){...}
    void Parent_public_method(Parent_obj_t* self){...}
    void Parent_static_method(){...}
    void Parent_param1(Parent_obj_t* self, char* out, unsigned int max_len){...}
    void Parent_del(Parent_obj_t* self){...}
    
    /// Child Class ///
    // public methods
    void Child_init(Child_obj_t* self, Parent_obj_t* super){...}
    void Child_del(Child_obj_t* self){...}
    --------------
    

    Modules and namespaces can be modeled using folders and prefixing your structs and functions.


  • There are a few approaches to implementing OOP in C. The language doesn’t give you any constructs to implement this out of the box, so it’s up to the developer to do it. Since there is no definite way to do it, let me just give you some examples and you can decide how to use it in your project:

    class Parent:
        def __init__(self):
            self.__hidden_state = "properties"
        def __private_method(self):
            print("private method")
        def public_method(self):
            print("public method")
        @staticmethod
        def static_method():
            print("static method")
    
    class Child(Parent):
        def __init__(self):
            super().__init__()
            self.__hidden_state = "child properties"
    

    I would split the C code for this into header and source files:

    (header.h)