// circtor.cpp // circles use constructor for initialization #include <iostream> //#include "msoftcon.h" // for graphics functions #include <graphics>

using namespace std; //////////////////////////////////////////////////////////////// class circle //graphics circle { protected: int xCo, yCo; //coordinates of center int radius; color fillcolor; //color fstyle fillstyle; //fill pattern public: //constructor circle(int x, int y, int r, color fc, fstyle fs) : xCo(x), yCo(y), radius(r), fillcolor(fc), fillstyle(fs) { } void draw() //draws the circle { set_color(fillcolor); //set color set_fill_style(fillstyle); //set fill draw_circle(xCo, yCo, radius); //draw solid circle } };

//////////////////////////////////////////////////////////////// int main() { init_graphics(); //initialize graphics system //create circles circle c1(15, 7, 5, cBLUE, X_FILL); circle c2(41, 12, 7, cRED, O_FILL); circle c3(65, 18, 4, cGREEN, MEDIUM_FILL); c1.draw(); //draw circles c2.draw(); c3.draw(); set_cursor_pos(1, 25); //lower left corner return 0; }

this is my source code

// circtor.cpp // circles use constructor for initialization #include <iostream> //#include "msoftcon.h" // for graphics functions #include <graphics>

use backticks for short code, and paste services for long code

okk

Anyone has book for competitive programming in c++

Anyone has book for competitive programming in c++

You don't need a book, you need to solve problems :D

Any good sites for that

Anyone has book for competitive programming in c++

You want to practice?

Yaa for placement point of view

Hacker rank or some similar website might do the job

geeksforgeeks.org, for instance :D

codewars is very popular

I don't understand competitive programming. I get obfuscated programming but speed programming just leads to mistakes

what about codeforces

Explain different functions in C to handle . Error during I/O operations

What do you mean by that? In C most of error handling is based on if statements. fopen returns null if the file wasn't open. fprintf returns a negative if data wasn't printed... etc. There are also posix/windows tools to handle errors, but they are not exactly a part of language. Do you mean this kind of error handling?

> codes own exception system in C with gotos

Hello. How i can define this functon? line 50

i got un error

why would you redefine main

why would you redefine main

I want use second function in 1st main

you cant redefine main that way just call it inside

like this void main() { printf("In 1st main\n"); func1(); } #define main func1 void main() { printf("In 2nd main\n"); }

you cant redefine main that way just call it inside

just call inside doesn't work

How can you have several mains? Main is an entry point and loader calls it first

you cant have two mains

or you want to chose which one?

just with main() it's work, but i can't do the same with WINAPI WinMain

I don't get what you want, but maybe this? #ifdef MAIN1 void main() { func1(); } #else void main() { func2(); } #endif

you cant have two mains

i can))

no

like this void main() { printf("In 1st main\n"); func1(); } #define main func1 void main() { printf("In 2nd main\n"); }

👆🏻

Why can't you give proper name to your functions?

Why can't you give proper name to your functions?

The problem is not this))

You have only one main

/warn advertising

Hey guys how can i use button and link with my header files in c++ please help me

no

Can still promote them then finally add

Hey guys!

I am studying classes and objects with an app but i don't understand

What's classes and objects?

What's classes and objects?

classes are blurprints for objects objects are objects

Can I make an assumption? Is C++ more popular in here than C?

If I needed objects or classes, I generally just make structs as I don't believe OOP is a useful paradigm

classes are blurprints for objects objects are objects

Ok (?)

If I needed objects or classes, I generally just make structs as I don't believe OOP is a useful paradigm

Are you C programmer ?

If I needed objects or classes, I generally just make structs as I don't believe OOP is a useful paradigm

clearly , you are not depending on objects heavily

Yes, I try to keep to C where possible

I remember there is unofficial thing called C+ (I forgot the real name), like you can use basic c++ stuff (classes, oop) but don't use std, minimize template usage, don't use all modern features (> C++11), it's great concept

thats what I use

For example, the IP structs in C could well have been classes in C++, but a struct works perfectly well without classes or anything that comes with it

did you write really large projects in C?

Yes, I try to keep to C where possible

well , you could but its not the perfect option in any case unless you are working with embedded systems / low level stuff

Yes, I wrote a minimal browser entirely in C

did you write really large projects in C?

sure he is not because he CAN'T

loool

Yes, I wrote a minimal browser entirely in C

which Gui lib you had used ?

I've written a text editor with GTK in C

sure he is not because he CAN'T

you can do everything you want in C, the problem if you are brave enough to do it

I've written a text editor with GTK in C

yeah but gtk have the objects concept :D

Didn't. The browser was a text based browser (links style)

I remember doing one large thing in C but later moved to C++ because I got exhausted of naming all methods with prefixes and so lol

yeah but gtk have the objects concept :D

Which you can ignore quite well

another problem is that, even if C is the fastest language, it's not automatic that you get the best result. for example, graphical libs with C bindings aren't very good

Which you can ignore quite well

yeah and afaik thats how they build gnome ?

Personally, I prefer the standard X11 libs but I'm a very minimal developer

If I needed objects or classes, I generally just make structs as I don't believe OOP is a useful paradigm

So you just recreate the same thing poorly with structs 😉

not just that but you also set custom bit sizes for each property loool

I try and avoid a case which would require classes wherever possible

There is always a way to write things without classes, which it the way I tend to try and use

I remember doing one large thing in C but later moved to C++ because I got exhausted of naming all methods with prefixes and so lol

lol

There is always a way to write things without classes, which it the way I tend to try and use

but its not the best way , if you could it doesn't mean you should