General C++ Programming - C++ Forum

class State { public: State(); protected: private: std::unordered_map<std::string,std::unique_ptr<int>> objects; }; Th...

[7 replies] Last: Actually, the int type is just a placeholder. It was originally of typ... (by Gadersd)

by Rafay3

C++ Game

I Try to make a game..and you have to Create Unique name Everytime or game over but It crash when I start the game #include <iostream> using namespace std; st...

[3 replies] Last: Use a std:;vector instead. vector will allow you to store an unlimite... (by AbstractionAnon)

by Cambalinho

how can i convert a string result to LPVOID?

imagine that my string value is a variable adress. can i convert that value to LPVOID?(i mean the value and not the string adress)

[4 replies] Last: I missed that your string value was a variable address. Any techniq... (by AbstractionAnon)

by codebanger

unsigned char to string

I'm looking at using openSSL. They use unsigned char in the functions. I'm trying out some conversions with the following: < #include <iostream> #include <stdi...

[1 reply] : You are experiencing sign extension on the str hex: output. Because t... (by koothkeeper)

by nura1717

Please help: Error: Expected Primary-Expression

Hello guys. I am having this strange error while making a game in SDl2/codeblocks. Error is related to c++ programming and not to SDL library or anything. H...

[4 replies] Last: Thank you. (by nura1717)

by Cambalinho

how make a multithread correctly synchronizated?

how can i make a multithread, correctly, synchronition? for make a multtihread function i must do use: pthread_create() using mutex i can synchronizate(say...

[4 replies] Last: Delaying the thread for a specific time doesn't guarantee to make your... (by Shadowwolf)

by Harutyun

Some questions about C++ programming.

Hi I'm pretty new to C++ and obviously I have some questions about some problems I'm having. 1) Some people say that using "using namespace std" is not pro...

[2 replies] Last: 1. You can use google. https://www.google.se/?gfe_rd=cr&ei=4wiFVr68NK... (by TarikNeaj)

by ggurhann

appcrash fault

it gives appcrash problem after command promt window when i run it. i use dev c++ 4.9.9.2 #include <iostream> #include<string> using namespace std...

[5 replies] Last: thank u "Why is deneme() calling deneme()?" i understand... (by ggurhann)

by andrewllewop

find the last word in a string

I assumed that there would be functions to cover a lot of these string operations I've been doing lately but... Here is my newest problem. I am writing a fun...

[5 replies] Last: Same logic as above (reverse the string, read first token from the rev... (by JLBorges)

by NuklearKrisis

using == with an assignment expression

What is this saying exactly? int result = (num1 % num2) == 0 I don't understand how the == 0 works. If the statement doesn't make sense here is where I ...

[2 replies] Last: Thank you very much! (by NuklearKrisis)

by TinyTertle

creating strings with specific conditions.

I'm trying to create a Book class with a string member representing the ISBN. The ISBN must follow the format n-n-n-x where each n is an integer and x is a char...

[1 reply] : Use the standard regular expressions library. http://en.cppreference.c... (by JLBorges)

by glasses

Using 2D vectors

I want to construct two 2D vectors to which I can add vectors to in the future. However, even the beginning attempt to push_back a 1D vector as the first row of...

[4 replies] Last: If you want to modify an existing element, use the array syntax or... (by Chervil)

by Some Moron

Crash when assigning values, but only meaningful ones

- I doubt anyone else will have this particular problem, but have a discussion topic. This problem has been fixed and was related to the MASSIVELY quirky way t...

[4 replies] Last: I haven't previously used valgrind, but I will look into it to see if ... (by Some Moron)

by ahmmkh

a problem set by c++ and c

Write a program without any semicolons and it takes an input X from the user and then print "Hello" X times each "Hello" in a single line

[7 replies] Last: Actually most of them are working guys , but i actually managed to und... (by ahmmkh)

by GibsRey

Need PDFs!

I've read tutorial about C and C++ in PDF, i downloaded the C++ PDF From this site, Now can you please give me some links to download C++ Intermediate Tutorials...

[2 replies] Last: Groningen C++ Annotations (pdf and other formats): https://github.com/... (by JLBorges)

by Ketan

System command with Two arguments

Hello, Upto best of my knowledge, I know that system command takes string as input. This string can be of any thing, which works fine into command prompt. For ...

[3 replies] Last: > I would like to know whether system command does behave same as comm... (by JLBorges)

by geeloso

Why this behavior?

Hey guys! I have a struct template nodeType and a class template nodeType as shown below and I have shown the simple definition of the member function node...

[6 replies] Last: > when returning just a type, a reference to a type, or a const refere... (by JLBorges)

by Wu zhen hai

something confused

#include <iostream> template <class T1, class T2> void fun(T1&&, T2&&) { std::cout << typeid(T1).name() << " " << typeid(T2).name() << std::endl; } class...

[2 replies] Last: Thanks! BR! (by Wu zhen hai)

by Wu zhen hai

thread construction function does not support function overloading

//thread construction function does not support function overloading //it is so unfriendly #include <thread> #include <iostream> class A { public: void ...

[2 replies] Last: thanks! BR! (by Wu zhen hai)

by andrewllewop

string search

How can I compare two strings to seen if more than one word matches? Eg. str1= ("Computer Architecture) Str2= (computer systems and Architecture etc) Sinc...

[5 replies] Last: thanks, with some modifications it works exactly for me (by andrewllewop)

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General C++ Programming - December 2015