UrbanPro

Learn C Language from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Search in

How do I use structs in C to emulate classes?

Asked by Last Modified  

Follow 3
Answer

Please enter your answer

Follow below example program: typedef struct object object, *setCoordinates; struct object { float x, y; void (*setCoordinates)(object *self, float x, float y); void (*getYCoordinate)(object *self); void (*getXCoordinate)(object *self); }; void object_setCoordinates(object...
read more
Follow below example program: typedef struct object object, *setCoordinates; struct object { float x, y; void (*setCoordinates)(object *self, float x, float y); void (*getYCoordinate)(object *self); void (*getXCoordinate)(object *self); }; void object_setCoordinates(object *self, float x, float y){ self->x = x; self->y = y; } float object_getXCoordinate(object *self){ return self->x; } float object_getYCoordinate(object *self){ return self->y; } object point; point.setCoordinates = object_setCoordinates; point.getYCoordinate = object_getYCoordinate; point.getXCoordinate = object_getXCoordinate; point.setCoordinates(&point, 1, 2); printf("Coordinates: X Coordinate: %f, Y Coordinate: %f", point.getXCoordinate, point.getYCoordinate); read less
Comments

Tutor

Classes are structures with a hidden pointer to a table of function pointers called VTable. The Vtable itself is static. When types point to Vtables with the same structure but where pointers point to other implementation, you get polymorphism. It is recommended to encapsulate the calls logic in function...
read more
Classes are structures with a hidden pointer to a table of function pointers called VTable. The Vtable itself is static. When types point to Vtables with the same structure but where pointers point to other implementation, you get polymorphism. It is recommended to encapsulate the calls logic in function that take the struct as parameter to avoid code clutter. You should also encapsulate structures instantiation and initialization in functions (this is equivalent to a C++ constructor) and deletion (destructor in C++). These are good practice anyway. typedef struct { int (*SomeFunction)(TheClass* this, int i); void (*OtherFunction)(TheClass* this, char* c); } VTable; typedef struct { VTable* pVTable; int member; } TheClass; To call the function int CallSomeFunction(TheClass* this, int i) { (this->pVTable->SomeFunction)(this, i); } read less
Comments

Related Questions

How do I execute the Java program?
javac nameofprogram.java java nameofprogram note***:Name of program should be same as that of your class name having main method *** above steps are used to execute programs on command line
Sharmistha
0 0
6
Who created C?
C programming language was created by Dennis Ritchie at Bell Labs in the early 1970s. Along with Ken Thompson, Ritchie developed C as an evolution of the B programming language, aiming to provide a more...
Srinivasan
0 0
8
what is syntex error
A syntax error is an error which found in the source code of a program or sometimes it can be small grammatical mistakes in spelling or limited to a single character. Programming languages follow their...
Tanha

Is C language is used for hack or not?

Yes its is used for hacking purpose.
Jangam

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Creating First Program Using C Language
Step 1: Install and setup Turbo C compiler on your computer. Step 2: Open Turbo C from your Desktop or Programs menu. Select “File” from menu bar and select option “New”. Step...

Functions In C Programming
A C-language program is nothing but collection of Function, these are the building blocks of a ‘C’ program. Generally, a function mans a task. “Function is a...

Swapping variable contents using C
/* WAP to swap the content of variables using C*/ //Header files #include<stdio.h>#include<conio.h> //Main function void main(){ //Variable declaration of type integer int a,b,c; //function...

Why we need to learn Programming languages?
Language is medium for communication. If two parties like to communicate or exchange the thoughts they must know a language. Language should be understandable by both the Parties. For example A wants to...

Program to swap the value of two variables without using third variable(simplest way)...
int main() { int a=10,b=20; printf("values of a before swap ="%d,a); printf("values of b before swap ="%d,b); a=a+b; b=a-b; a=a-b; printf("******************"); printf("values of a after swap...

Recommended Articles

Lasya Infotech is a Hyderabad based IT training institute founded in 2016 by O Venkat. Believing in his innovation, passion and persistence and with a diverse blend of experience, he started his brainchild to deliver exemplary professional courses to aspiring candidates by honing their skills. Ever since the institute envisions...

Read full article >

Brilliant Academy is one of the reputed institutes for B.Tech tuition classes. This institute is specialised in delivering quality tuition classes for B.E, Engineering - all streams and Engineering diploma courses. Incorporated in 2012, Brillant Academy is a brainchild of Mr Jagadeesh. The main motto of the academy is to...

Read full article >

Applications engineering is a hot trend in the current IT market.  An applications engineer is responsible for designing and application of technology products relating to various aspects of computing. To accomplish this, he/she has to work collaboratively with the company’s manufacturing, marketing, sales, and customer...

Read full article >

Microsoft Excel is an electronic spreadsheet tool which is commonly used for financial and statistical data processing. It has been developed by Microsoft and forms a major component of the widely used Microsoft Office. From individual users to the top IT companies, Excel is used worldwide. Excel is one of the most important...

Read full article >

Looking for C Language Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for C Language Classes?

The best tutors for C Language Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Learn C Language with the Best Tutors

The best Tutors for C Language Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more