Unanswered questions in C++

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Check if element found in array c++

How can I see if the element ...READ MORE

Nov 17, 2022 in C++ by Ashwini
 • 5,430 points • 571 views
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Best way to split a vector into two smaller arrays?

I'm attempting to divide a vector into ...READ MORE

Nov 17, 2022 in C++ by Ashwini
 • 5,430 points • 939 views
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Correct way to work with vector of arrays

Could someone please explain how to work ...READ MORE

Aug 23, 2022 in C++ by Nicholas
 • 7,760 points • 427 views
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Read whole ASCII file into C++ std::string

I need to load an entire file ...READ MORE

Aug 23, 2022 in C++ by Nicholas
 • 7,760 points • 681 views
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Making a class abstract without any pure virtual methods

I take a class where we watch ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 619 views
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Differentiate between function overloading and function overriding

Differentiate between function overloading and function overriding ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 406 views
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What is the point of function pointers?

The purpose of function pointers is difficult ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 291 views
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What are the differences between struct and class in C++?

I now want to understand the distinctions ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 379 views
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What does '&' do in a C++ declaration?

As a C person, I'm attempting to comprehend some C++ code.  The declaration of my function is as follows: int foo(const string &myname) { cout ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 284 views
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How to end C++ code

I want my C++ code to terminate  ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 267 views
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get absolute value without using abs function nor if statement

How might I obtain an integer's absolute ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 1,085 views
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How do I set up Visual Studio Code to compile C++ code?

Although the Visual Studio Code editor from ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 496 views
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What is the difference between std::list<std::pair> and std::map in C++ STL?

What distinguishes std::list<std::pair> from std::map? Does the ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 384 views
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Remove elements of a vector inside the loop

I am aware that there are questions like this one, but I was unable to use them to help me decipher my code.  I just want to remove or delete one element from a vector by running a loop over its property.  How can I go about doing that?  I tried the following code, but I got an ambiguous error message: 'operator =' function is unavailable in 'Player’. ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 475 views
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Why is the size of an empty class in C++ not zero?

Why does the following output 1? #include <iostream> class Test { }; int ...READ MORE

Aug 17, 2022 in C++ by Nicholas
 • 7,760 points • 399 views
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memory allocation for objects

In C++, a variable like int x ...READ MORE

Aug 16, 2022 in C++ by Nicholas
 • 7,760 points • 344 views
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How does "this" cascading work?

The following class interface I have is: ...READ MORE

Aug 16, 2022 in C++ by Nicholas
 • 7,760 points • 266 views
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Why was the ampersand chosen as the symbol for references in C++?

Does anyone know why the ampersand was ...READ MORE

Aug 16, 2022 in C++ by Nicholas
 • 7,760 points • 307 views
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memory allocation for objects

When we instantiate a variable in C++, ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 346 views
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(->) arrow operator and (.) dot operator , class pointer

In C++, we know that given a class pointer, we use the (->) arrow operator to access the members of that class, as seen here: #include <iostream> using namespace std; class myclass{ ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 522 views
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What is a stream in C++?

I've been hearing a lot about streams, ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 299 views
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How to Access Subgraphs of an Existing Graph in Boost

I read a graph using read graphviz() ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 524 views
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Is there a maxheap in the C++ standard library?

I understand that the std::priority queue class ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 505 views
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how to print \" in C++

I need to print the following string: std::string("-I\"/path/to/dir\" "); Basically, I need to accomplish this since I am generating C++ code using C++ code. I want to use an ofstream to write the above string, so something like ofstream fout; fout << the_string ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 411 views
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Efficient way to return a std::vector in c++

When delivering a std::vector in a function, how much data is duplicated, and how much of an optimization will it be to place the std::vector in free-store (on the heap) and provide a pointer instead, i.e. is: std::vector *f() { std::vector *result = new ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 448 views
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std::cin input with spaces?

#include <string> std::string input; std::cin >> input; The user want to type "Hello World."  However, cin fails to recognise the space between the two words.  How do I get Cin to see the entire Hello World? I'm trying this using structs, and cin.getline doesn't appear to work.  This is my code: struct cd { ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 745 views
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In C, are arrays pointers or used as pointers?

First, look at this code When this is ...READ MORE

Aug 11, 2022 in C++ by krishna
 • 2,820 points • 325 views
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How to generate a random number in C++?

I'm attempting to develop a dice game, and I need random numbers to represent the sides of the die.  I can make a number between 1 and 6).  Using #include <cstdlib> #include <ctime> #include <iostream> using namespace ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 315 views
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declaring a priority_queue in c++ with a custom comparator

I'm attempting to declare a priority queue of nodes using the comparator function bool Compare(Node a, Node b) (which is outside the node class). I presently have the following: priority_queue<Node, vector<Node>, Compare> openSet; I'm receiving Error: "Compare" is not a type name for some reason. Adding priority_queue<Node, vector Node>, bool Compare> to the declaration. gives me the error 'Error: expecting a '>' I've also attempted: priority_queue<Node, vector<Node>, Compare()> openSet; priority_queue<Node, ...READ MORE

Aug 11, 2022 in C++ by Nicholas
 • 7,760 points • 796 views
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Confused with object arrays in C++

I have some Java knowledge and now ...READ MORE

Aug 11, 2022 in C++ by krishna
 • 2,820 points • 259 views
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Is C++ considered weakly typed? Why?

C++ has always struck me as one ...READ MORE

Aug 8, 2022 in C++ by Nicholas
 • 7,760 points • 1,390 views
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Difference between 'struct' and 'typedef struct' in C++?

In C++, is there any difference between: struct Foo ...READ MORE

Aug 8, 2022 in C++ by Nicholas
 • 7,760 points • 536 views
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How do you properly use namespaces in C++?

I come from a Java background where ...READ MORE

Aug 8, 2022 in C++ by Nicholas
 • 7,760 points • 502 views
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What are Containers/Adapters? C++

What exactly are containers/adapters? I am familiar ...READ MORE

Aug 8, 2022 in C++ by Nicholas
 • 7,760 points • 346 views
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How do you open a file in C++?

I want to open a file in ...READ MORE

Aug 8, 2022 in C++ by Nicholas
 • 7,760 points • 444 views
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How come an array's address is equal to its value in C?

The pointer values and pointer addresses in ...READ MORE

Aug 8, 2022 in C++ by krishna
 • 2,820 points • 389 views
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0 answers

How can I get the size of a C++ function?

In C++, how can I find the size& ...READ MORE

Aug 5, 2022 in C++ by Nicholas
 • 7,760 points • 421 views
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Nested try...catch inside C++ exception handler?

I may wish to run code that might throw an exception in my exception handler. Is the following C++ structure acceptable?  Are there any drawbacks if so? try { // ... } catch (const ...READ MORE

Aug 5, 2022 in C++ by Nicholas
 • 7,760 points • 384 views
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How can I get double quotes into a string literal?

I used the printf() command to produce the output seen below: printf("She said time flies like an arrow, ...READ MORE

Aug 5, 2022 in C++ by Nicholas
 • 7,760 points • 591 views
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std::string length() and size() member functions

While reading the responses to this topic, ...READ MORE

Aug 5, 2022 in C++ by Nicholas
 • 7,760 points • 790 views
0 votes
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Insert object at index of vector c++

I have to add a new item to the existing object vector.  Although I am aware that an iterator must be used, I am not entirely sure how it operates. I need to insert a new item by name in the precise index that I found after some searching into an alphabetically sorted vector.  I have this, then. vector<Person>people; int index =54; Person temp; people.push_back(temp);//insert at end of ...READ MORE

Aug 5, 2022 in C++ by Nicholas
 • 7,760 points • 545 views
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How to make an array with a dynamic size? General usage of dynamic arrays (maybe pointers too)?

I wanna create a program that can ...READ MORE

Aug 5, 2022 in C++ by krishna
 • 2,820 points • 752 views
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What is meant with "const" at end of function declaration?

I received a book in which it is written: class Foo { public: int ...READ MORE

Jul 28, 2022 in C++ by Nicholas
 • 7,760 points • 361 views
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How can i sort a map by its .second parameter

How can I output all the int ...READ MORE

Jul 28, 2022 in C++ by Nicholas
 • 7,760 points • 606 views
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Check if a string contains a string in C++

I've got a std::string variable. I'd want ...READ MORE

Jul 28, 2022 in C++ by Nicholas
 • 7,760 points • 524 views
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Container Class vs Class - C++

I'm new to programming and have only ...READ MORE

Jul 28, 2022 in C++ by Nicholas
 • 7,760 points • 279 views
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How to code a modulo (%) operator in C/C++/Obj-C that handles negative numbers

As a mathematician, one of my pet peeves of C-derived languages is : (-1) % 8 // comes out as ...READ MORE

Jul 27, 2022 in C++ by Nicholas
 • 7,760 points • 318 views
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What type of members can I add in a c++ abstract class

Hello, let's say I have an abstract class with a few pure abstract functions and a few classes that derive from it, and all of the data from these classes eventually becomes similar, I was wondering if it would be wise, or even possible, to declare a vector under protected in the abstract class to collect the data so something like that. class A { protected: vector <string> ...READ MORE

Jul 27, 2022 in C++ by Nicholas
 • 7,760 points • 315 views
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What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?

I looked up the differences between cout, ...READ MORE

Jul 27, 2022 in C++ by Nicholas
 • 7,760 points • 578 views
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Simple C++ swap function

Why is it that if I have a method like this to swap two numbers, it doesn't work[swap], (I know I can accomplish this by defining pointers in the prototype and then passing the addresses of the relevant variables in main()), yet it works for arrays without having to supply pointers and addresses? It does not work. void num_exchange(int m, int n); int main(){ int num1 ...READ MORE

Jul 27, 2022 in C++ by Nicholas
 • 7,760 points • 351 views

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