I want to learn c++ from starting i mean from basic can you guys plzz suggest me a website aur any other source from where i get the c++ knowledge from basic (beginners)

Anybody here good in java?

#include<iostream> #include<conio.h> using namespace std; void binary(int a[],int lb,int ub,int x) { int mid; while(lb<=ub) { mid=(lb+ub)/2; if(a[mid]==x) { puts("yes."); return; } else if(x<a[mid]) binary(a,lb,mid-1,x); else if(x>a[mid]) binary(a,mid+1,ub,x); } if(lb>ub) puts("not."); } int main() { int a[15],n,i,x; printf("Enter the size of array: "); scanf("%d",&n); printf("Enter elements: "); for(i=0;i<n;i++) scanf("%d",&a[i]); printf("Enter data: "); scanf("%d",&x); binary(a,0,n-1,x); return 0; }

Anyone knows any YouTube channel for learn C++ for beginners??

No channels, read books

the new boston

only difference is the default visibility label in structures and classes

so, it's not a problem to use both, when one is more suitable for specific case

structures by default is public, classes, private

hello, is there a problem to use "struct" instead of "class" keyword, if i have only public definitions ? obviously struct acts like class, but it starts public by default, and can use private later, class starts private by default, but can be switched to public or protected... I know how it is working, But in general is there any possible issues, or is it a good practice to use "struct" instead of "class" for shortening the source code lines...

i will assume these keyword are interchangeable, just default visibility differs, but doesn't affect compilers internal job

NOT just default visibility, but yes, interchangeable.

what else is different?

i will assume these keyword are interchangeable, just default visibility differs, but doesn't affect compilers internal job

If you are talking about class and structs YES

Default inheritance type

i am trying to get rid of cpp files when its possible, and to impelement functions inside the class definition section...

does #pragma once, works like #ifndef header_h #define header_h ..... #endif it seems to do the job, but is this a good aproach?

Yes it does

I don't think this is a good practice because not all compilers support #pragma once afaik

every modern one does

Best book to learn C and C++ in easy way.. newbie like me

Ok

#googleit

Best book to learn C and C++ in easy way.. newbie like me

Okay, excuse me for asking dumb questions, i can google that of course, but i prefer information from humans, not machine...

Okay, excuse me for asking dumb questions, i can google that of course, but i prefer information from humans, not machine...

Ok

The manual include guards can be little bit confusing Consider this example You have two folders each of which has user.hpp The first folder is Database contains the functionality that deal with Users table or database under the user.hpp file. The second folder has the definition of the class User under user.hpp You have two files with the same name under different folders(no confliction) When you generate both header files through IDEs Both of the files has the definition USER_HPP macro Then if both files were included (and will) It will cause one of them as it was not pre-processed that implys lots of hard to track compiler errors

does #pragma once, works like #ifndef header_h #define header_h ..... #endif it seems to do the job, but is this a good aproach?

Good Luck :)

For "is it a good approach" - ONCE is not crossplatform, it is feature of a specific compiler

okay, so it's not standartized, but if it is supported, it can be used

okay, so it's not standartized, but if it is supported, it can be used

There are problems with it, too. If two headers of same name are in two different directories, what the compiler should consider them to be? Same header or two different headers?

So I suggest for local small projects you can use ONCE, for crossplatform and production level projects -- use #ifdef GUARDs and, maybe ONCE, if #pragma once gives you better compilation speed

Besides, #pragma once don't have explicit end , so it can only switch off the entire source file

https://pastebin.com/afTfim57 Can`t figure out! error: array type 'char [46]' is not assignable. More details about error in the end of the code. Can someone help me? I find that I can solve this problem using function strcpy but how can I do this correct?

https://pastebin.com/afTfim57 Can`t figure out! error: array type 'char [46]' is not assignable. More details about error in the end of the code. Can someone help me? I find that I can solve this problem using function strcpy but how can I do this correct?

You must use one of std::copy, std::memcopy, std::strcpy or write your own copy routine

#include <stdio.h> void printer (int *p,int *q) { int x=*p+6; int y =*q-30; printf(“%d\n”,x); printf(“%d\n”,y); } void subprint(int *x,int *y) { *x=*y/7; *y=*y*3; printf(“%d\n”,x); printer(&*x,&*y); printf(“%d\n”,*x+1); printf(“%d\n”,*y-2); } void print(){ int x =42; int y=x/11; subprint(&y,&x); printf(“%d\n”,y); printf(“%d\n”,x); } int main () { int x =17; int y=84; print(); return (0); }

Hi, I've been a developer from the JAva background and have been picking up C++ since last year. I think for the basic C++ (pointers, OOP, ..etc) I'm able to master that well, but feel I need to polish up my skill on the newest C++ releases (e.g. C++ 17) because i've had difficulty employing the best practice. Are you able to suggest me a good book to continue with my learning? Thanks!

It's a good one, but it's C++14 only

ya.. i can see that too. i hope it doesn't hurt too too much :(

hi again friends, another silly question from me: if "," is used instead of ";" to separate operations (not when defining variables), is the execution order preserved e.g. crc >>= 4, crc ^= Table[idx], crc += 1234; Will this execute as ";" was used to separate the three operations? I like to use "," to keep the expression on single row after code refactoring and "beautification"... it looks more atomic, when there are few operations to the same variable, instead of writing as single expression like: crc = ((crc>>4)^table[idx]) + 1234; What you think about that?