#include <stdio.h> int main() { int n, c, k, space = 1; printf("Enter number of rows\n"); scanf("%d", &n); space = n - 1; for (k = 1; k <= n; k++) { for (c = 1; c <= space; c++) printf(" "); space--; for (c = 1; c <= 2*k-1; c++) printf("*"); printf("\n"); } space = 1; for (k = 1; k <= n - 1; k++) { for (c = 1; c <= space; c++) printf(" "); space++; for (c = 1 ; c <= 2*(n-k)-1; c++) printf("*"); printf("\n"); } return 0; }

Any simplification to reduce code

What you mean? First is call the A constructor everytime i know

In A b = B();, C++ will: 1. call the explicitly called default constructor of B, 2. call the copy constructor of A, say A::A(const A&). In the process of 2, the object of B, which is constructed in 1, is passed as the parameter to A::A(const A&) and then, everything declared in B but not in A will be dropped. Since b is an object of the base class A, and does not have enough space to hold all elements of the derived class B.

B() creates a temp object of the class B, and then passed to the copy cosntructor of A. After the copy constructor is called, the temp object will then be destructed. Please kindly note that, b is an object of the base class A, rather than a pointer or a reference.

https://stackoverflow.com/questions/274626/what-is-object-slicing FYI.

https://stackoverflow.com/

Super developer site

#include <iostream> class Base { public: Base() : foo{0} { std::cout << "Default constructor of 'Base' is called." << std::endl; } Base(const Base& orig) : foo{orig.foo} { std::cout << "Copy constructor of 'Base' is called." << std::endl; } Base& operator=(Base& orig) { std::cout << "Copy assignment of 'Base' is called." << std::endl; this->foo = orig.foo; return *this; } virtual ~Base() {} private: size_t foo = 0; }; class Derived : public Base { public: Derived() : Base(), bar{0} { std::cout << "Default constructor of 'Derived' is called." << std::endl; } private: size_t bar = 0; }; int main() { Base derived = Derived(); return 0; } Gives the following result:

@LiamHuang Thx m8

In this snippet of code, derived is an object of the Base class, and hence has no member data named bar. However, calling Derived() creates a temp object of Derived, which, of course, has a member data named bar. In the copy constructor of Base, bar in the temp object of Derived is dropped. And we called this crop or slice.

Any simplification to reduce code

Here is a clue I could give you: every symmetry cause an abs(). good luck

Any simplification to reduce code

Since this looks like a homework, I'll not give you the answer directly. However, I have a more complex version of the plotting code. #include <stdio.h> const int w = 23; const int h = 12; int triangle(int x, int y) { return abs(x) <= y; } int f(int x, int y) { return triangle(x - 11, y) && triangle((x + y / 3 * 3 + 3) % 6 - 2, y % 3); } int main() { int x, y; for (y = 0; y < h; y++) { for (x = 0; x < w; x++) printf(f(x, y) ? "* " : " "); puts(""); } } Enjoy.

hey guys

c++ how game?

how to make game 3d?

opengl

c++ how game?

Unreal if you want a game engine. You can do also with sfml (and opengl as already suggest)

Hmmm, if you have enough basic mathematics knowledge, You could draw static 3D figures by pure C/C++ codes.

For example, I draw this figure by pure C codes. (light refraction in a glass M shape)

lol

However, for game programming, a game engine is required.

For example, I draw this figure by pure C codes. (light refraction in a glass M shape)

Opengl?

Opengl?

Nope, just math.h, stdlib.h, some mathematics calculation and of course a plotting library (just for saving figures).

Ah, cool

How much time take to create this image?

I don't know... It's a secondary product of a major project.

Hard to estimate...

lower the sample number. (Monte Carlo integration)

lower the sample number. (Monte Carlo integration)

cool

who can help me

please

in c programming enter n and show this number n power or not of 3 and which power without multyple and devide ways only if else and for

in c programming enter n and show this number n power or not of 3 and which power without multyple and devide ways only if else and for

1) make a division function using sub (-) 2) loop division by 3 of the number and count the iterations while the numbers is >=3 if it begins equal 3 it's a power of 3 else not and the iteration count is the exponent n

1) make a division function using sub (-) 2) loop division by 3 of the number and count the iterations while the numbers is >=3 if it begins equal 3 it's a power of 3 else not and the iteration count is the exponent n

can you write

please

nope

please

help me

what's this?

what's this?

adaptive filter diagram

Hello guys

do you have hack channels

premium account?

Hi there

I really really want to learn programming language But unfortunately there is no course or any center in my town to learn Can you tell me where to start plz

I really really want to learn programming language But unfortunately there is no course or any center in my town to learn Can you tell me where to start plz

hey there, you can simply learn from internet and books + practice and dedication, but before beginning on writing code i would suggest to learn how to have a right mindset and about "problem solving", simply because alot of people think about remembering the syntax but don't know what the tool (code) they have does, and don't know how to assemble everything together to create what you want

lemme find a good beginner book on c++ for ya

hi

I really really want to learn programming language But unfortunately there is no course or any center in my town to learn Can you tell me where to start plz

also, before starting ( i assume you are on windows ) install visual studio 17 https://youtu.be/39IsItNIoQs follow this video until it installed

if you need help write your problem here or just pm me

hi

Hello, welcome

lemme find a good beginner book on c++ for ya

Thank you so much

if you need help write your problem here or just pm me

Thank you again ☺️☺️

hey there, you can simply learn from internet and books + practice and dedication, but before beginning on writing code i would suggest to learn how to have a right mindset and about "problem solving", simply because alot of people think about remembering the syntax but don't know what the tool (code) they have does, and don't know how to assemble everything together to create what you want

glad someone one here stated right approach for mastering things

glad someone one here stated right approach for mastering things

i see alot of people focusing on syntax and memorizing it, they soon get confused if you ask to create something different with the same tools (even simple stuff)

Thank you again ☺️☺️

no problem lad, always here to help

Also guys, if you need a book just ask and i will send it

Hello, guys. Is anyone working on MacBook in Sublime? Could you say how to compile my code there?

Hello, guys. Is anyone working on MacBook in Sublime? Could you say how to compile my code there?

use gcc, you can compile via terminal, compile via integrated sublime terminal or there should be some ways to make compilation within the editor (somewhere in the lines of make and cmake i guess)

I have one year left before graduation..AT THE end of 2018 i am supposed to make a mobile application as a graduation project..will i be able to learn java in summer?

I have one year left before graduation..AT THE end of 2018 i am supposed to make a mobile application as a graduation project..will i be able to learn java in summer?

even in 2 days or a coupleof hours if you really want to

and already knowing c++ is really helpfull

Thank u

😌

one thing different is the input, you need to manually cast a string ex. int x = Integer.parseInt(s); // needs to be in a try catch or // need to throw IOException

the rest is similar to c++, output is made with a function within an object within a Class (System.out.println if you wanna go new line at the end or System.out.print if you dont want to) if, while, do while, for and switch case are the same as c++ variables are almost equals (except boolean instead of bool and arrays are defined a bit differently) main in a method (function) inside a class classes have same idea but a bit different syntax,for example.you have to tell each attribute and method if it's public, protected or private and methods are defined within the class after the prototype

and everything has to be within a class

this is a sum up of what to expect with java

and in methods if you parse a primitive variable its parsed by value, and an object or array by reference

objects and arrays (arrays are objects) are parsed by reference

try modifying an external object within a method

it modifies it

strange, with me it worked parse by reference

https://www.google.it/url?sa=t&source=web&rct=j&url=https://www.javaworld.com/article/2077424/learn-java/does-java-pass-by-reference-or-pass-by-value.amp.html&ved=0ahUKEwiQueDbmfbXAhVEXBoKHSwtAJ0QFgg4MAM&usg=AOvVaw2lU7FetN_b1451EFANOMwo&ampcf=1

in fact

it copies the reference