Trending questions in C++

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C++ code file extension? What is the difference between .cc and .cpp [closed]

GNU GCC recognizes all of the following ...READ MORE

Jun 21, 2022 in C++ by Damon
 • 4,960 points • 1,678 views
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1 answer

What is the difference between public, private, and protected inheritance in C++?

To begin answering that question, let me characterise member accessors in my own terms.  If you already know this, proceed to the section "next:". I'm aware of three types of accessors: public, protected, and private. Let: class Base { public: ...READ MORE

Jul 11, 2022 in C++ by Damon
 • 4,960 points • 844 views
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When and why do I need to use cin.ignore() in C++?

In C++, I developed a simple application that requested the user to enter a number and then a string.  Surprisingly, when I ran the application, it never paused to ask for the string.  It simply ignored it.  After conducting some research on StackOverflow, I discovered that I needed to include the following line: cin.ignore(256, '\n'); before the line with the string input  That addressed the problem and allowed the software to run.  My issue is why C++ need the cin.ignore() line, and how can I forecast when I will need to use it. Here's the software I created: #include <iostream> #include <string> using namespace std; int main() { ...READ MORE

Jul 4, 2022 in C++ by Nicholas
 • 7,760 points • 867 views
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What is the meaning of "generic programming" in c++?

What does generic programming in C++ mean? I'm ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 688 views
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How to convert a char array to a string?

Converting a C++ string to a char ...READ MORE

Jul 14, 2022 in C++ by Nicholas
 • 7,760 points • 600 views
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How does c++ std::vector work?

How do the addition and removal of ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 683 views
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C++ convert from 1 char to string?

I simply need to cast one character to string.  The inverse method is as easy as str[0]. The following suggestions did not work for me: char c = 34; string(1,c); //this doesn't work, the ...READ MORE

Jun 29, 2022 in C++ by Damon
 • 4,960 points • 1,238 views
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C++ vector erase function not working properly

Here is the code I want to use to delete any entries with values more than 2 and fewer than 5. vector<int> myvector{3, 3, 3, 3, 3, 3, ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 680 views
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Difference between for loop and the range based loop in C++

The distinction between a for loop and ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 662 views
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1 answer

Why is Turbo C++ showing this error in DOSBox on my Mac?

Your installation must be defective!  I have a Mac, and I'm typing this on it while using TurboC++.  Consider uninstalling and then reinstalling the programme. Download the package in the same way as you would a.dmg programme from the internet.  (For example, drag and drop the programme into the Applications folder)  Ascertain that your Applications folder is global to your system.  This is what I mean: When in Finder, select the "GO" option from the top menu bar. From the drop down option, choose "Computer." In the newly opened window, click on your hard disc. There is a "Applications" folder there.  That's where you should put TurboC++. Go to Launchpad, and start Turbo C++. ...READ MORE

Jun 28, 2022 in C++ by Damon
 • 4,960 points • 1,289 views
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What is object slicing?

What is object slicing in C++ and ...READ MORE

Jul 13, 2022 in C++ by Nicholas
 • 7,760 points • 608 views
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not able to run graphics in DEV C++

Unable to run the graphics from following ...READ MORE

Jul 15, 2022 in C++ by Nicholas
 • 7,760 points • 582 views
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C - If value in array

I have this goal to check if ...READ MORE

Jul 28, 2022 in C++ by krishna
 • 2,820 points
edited 6 days ago • 9 views
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Check if a string is palindrome

I need to write a software that ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 630 views
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0 answers

How to use setprecision in C++

I'm new to C++ and all I want to do is print my point number up to two digits.  For example, if the number is 3.444, the output should be 3.44, and if the number is 99999.4234, the output should be 99999.42.  How am I going to do that?  The value changes over time.  This is my code. #include <iomanip.h> #include <iomanip> int main() { ...READ MORE

Jul 5, 2022 in C++ by Nicholas
 • 7,760 points • 905 views
+1 vote
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Parse (split) a string in C++ using string delimiter (standard C++)

In C++, I'm processing a string like follows: using namespace std; string parsed,input="text to be parsed"; stringstream ...READ MORE

Jul 4, 2022 in C++ by Nicholas
 • 7,760 points • 927 views
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How to traverse stack in C++?

Is traversing std::stack possible in C++? It is not possible to traverse using the following method.  Because there is no member end in std::stack. std::stack<int> foo; // .. for (__typeof(foo.begin()) it = foo.begin(); ...READ MORE

Jun 1, 2022 in C++ by Nicholas
 • 7,760 points • 2,407 views
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Program to calculate square root c++

Making a C++ application to determine a number's square root.  The built-in arithmetic operator "sqrt" is not used in this application.  There are two variables: one for the user-inputted integer and the other for the number's square root.  This software does not function very well, and I am certain that there is a more effective method to accomplish it: Here is my full code: #include <iostream> using namespace ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 608 views
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How to pass reference-to-function into another function

Using function pointers as arguments for other ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 608 views
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What are the differences between a pointer variable and a reference variable?

What distinguishes a reference variable from a ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 583 views
0 votes
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Why aren't cmath's pow and sqrt templates?

I'm curious as to why std::sqrt and ...READ MORE

Jul 13, 2022 in C++ by Nicholas
 • 7,760 points • 515 views
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throwing a run time error

I just started Programming: Principles and Practice Using C++ because I'm new to programming.  Errors and how to handle them are covered in one of the chapters. What I'm attempting to implement is this little line of code.  The programme will end with a system error message and the text we gave as a parameter, according to the book's description of error(). #include <iostream> #include <string> using namespace std; int area (int ...READ MORE

Jul 13, 2022 in C++ by Nicholas
 • 7,760 points • 488 views
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1 answer

Check if element is in the list (contains)

The simplest and quickest method. You could also ...READ MORE

Jun 2, 2022 in C++ by Damon
 • 4,960 points • 2,281 views
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0 answers

How to use enums in C++

Suppose we have an enum like the following: enum Days ...READ MORE

Jul 7, 2022 in C++ by Nicholas
 • 7,760 points • 669 views
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How to create a dynamic array of integers

How can I use the new keyword ...READ MORE

Jul 15, 2022 in C++ by Nicholas
 • 7,760 points • 458 views
0 votes
1 answer

Is there an easy way to make a min heap in C++?

Use make heap() and its buddies from algorithm>, or priority queue from queue>.  Make heap and friends are used by priority queue. #include <queue> // functional,iostream,ctime,cstdlib using namespace std; int main(int ...READ MORE

Jun 27, 2022 in C++ by Damon
 • 4,960 points • 1,189 views
0 votes
1 answer

C++ string input

To read from cin, use a std::string.  Then you don't have to guess how big your buffer should be. std::string input; cin >> input; cout << intput; If you ...READ MORE

Jul 11, 2022 in C++ by Damon
 • 4,960 points • 664 views
0 votes
1 answer

What is the difference between std::__gcd and std::gcd?

I done some research about this. The ...READ MORE

Jun 10, 2022 in C++ by Damon
 • 4,960 points • 1,910 views
0 votes
0 answers

How to access static members of a class?

I'm learning C++ and Qt, but even the simplest code that I copy and paste from a book produces problems. On Ubuntu 10.04, I'm using g++4.4.2 with the QtCreator IDE.  Is there a distinction between the syntax of the g++ compiler and those of other compilers?  When I try to access static members, for example, something always goes wrong. #include <iostream> using namespace std; class A { ...READ MORE

Jul 7, 2022 in C++ by Nicholas
 • 7,760 points • 648 views
0 votes
0 answers

Static vs dynamic type checking in C++

I'm curious in the differences between static ...READ MORE

Jul 1, 2022 in C++ by Nicholas
 • 7,760 points • 702 views
0 votes
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Inbuilt __gcd(A,B) function in C++

I recently learned about a c++ specia ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 473 views
0 votes
1 answer

Has Windows an integrated built-in C/C++ compiler package?

Microsoft does not offer a compiler or ...READ MORE

Jun 14, 2022 in C++ by Damon
 • 4,960 points • 1,698 views
0 votes
0 answers

Purpose of Unions in C and C++

I had previously utilised unions with ease; however, I was startled when I read this post and discovered that this code union ARGB { uint32_t colour; ...READ MORE

Jul 13, 2022 in C++ by Nicholas
 • 7,760 points • 414 views
0 votes
0 answers

Do you use Qt and why do you use it?

Cons and advantages? How long does it ...READ MORE

Jul 13, 2022 in C++ by Nicholas
 • 7,760 points • 413 views
0 votes
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What's the Use of '\r' escape sequence?

I have C code like this: #include<stdio.h> int main() { ...READ MORE

Jul 13, 2022 in C++ by Nicholas
 • 7,760 points • 404 views
0 votes
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what is containership or nesting in C++?

According to what I believed, a class ...READ MORE

Jul 11, 2022 in C++ by Nicholas
 • 7,760 points • 430 views
0 votes
0 answers

Purpose of Unions in C and C++

I had previously used unions with ease, but when I read this post and learned that this code union ARGB { uint32_t colour; ...READ MORE

Jul 13, 2022 in C++ by Nicholas
 • 7,760 points • 389 views
0 votes
0 answers

Why doesn't C++ have a garbage collector?

First and foremost, I'm not raising this ...READ MORE

Jul 5, 2022 in C++ by Nicholas
 • 7,760 points • 695 views
0 votes
0 answers

Infix to Postfix notation C++

Hello there, Stack.  I'm currently learning C++ and trying to create an RPN converter.  But I'm having difficulties.  Hopefully, I'll be able to describe the issues in detail.  For stacking my operators, I'm using an array.  Let's look at the example "5 + 8."  When it comes down to: else if(infix[i] == '+' or infix[i] == ...READ MORE

Jun 29, 2022 in C++ by Nicholas
 • 7,760 points • 944 views
0 votes
1 answer

Vector of Vectors to create matrix

Before accessing any elements, you must first set the vector of vectors to the right size.  You may do it this way: // assumes using std::vector for brevity vector<vector<int>> matrix(RR, ...READ MORE

Jun 16, 2022 in C++ by Damon
 • 4,960 points • 1,547 views
0 votes
0 answers

Differences between C++ string == and compare()?

I just read some recommendations on using std::string ...READ MORE

Jul 7, 2022 in C++ by Nicholas
 • 7,760 points • 529 views
0 votes
0 answers

take string input using char* in C and C++

I'm having trouble accepting a string (actually a character array) as input.  Consider the following declaration: char* s; I have to input a string ...READ MORE

Jul 1, 2022 in C++ by Nicholas
 • 7,760 points • 571 views
0 votes
1 answer

Difference between Turbo C++ and Borland C++ compiler [closed]

I will try my best to respond, ...READ MORE

Jun 21, 2022 in C++ by Damon
 • 4,960 points • 1,293 views
0 votes
0 answers

C++ printing boolean, what is displayed?

I print a bool to an output stream like ...READ MORE

Jul 1, 2022 in C++ by Nicholas
 • 7,760 points • 550 views
0 votes
0 answers

How to choose between map and unordered_map?

Assume I wanted to map data that ...READ MORE

Jul 4, 2022 in C++ by Nicholas
 • 7,760 points • 614 views
0 votes
0 answers

What does the C++ standard state the size of int, long type to be?

I'm seeking for specific information on the sizes of basic C++ types.  I understand that it is determined by the architecture (16 bits, 32 bits, or 64 bits) and the compiler. But are there any C++ standards? On a 32-bit architecture, I'm using Visual Studio 2008.  This is what I get: char : 1 byte short : 2 ...READ MORE

Jul 7, 2022 in C++ by Nicholas
 • 7,760 points • 405 views
0 votes
1 answer

*this vs this in C++

This is a pointer, and *this is a pointer that has been dereferenced. If you had a function that returned this, it would be a pointer to the current object, but a function that returned *this would be a "clone" of the current object, created on the stack unless you defined the method's return type to be a reference. A small application that demonstrates the difference between working with copies and working with references: #include <iostream> class Foo { public: ...READ MORE

Jun 28, 2022 in C++ by Damon
 • 4,960 points • 864 views
0 votes
1 answer

How do I erase an element from std::vector<> by index?

You might perform the following to remove a single element: std::vector<int> vec; vec.push_back(6); vec.push_back(-17); vec.push_back(12); // Deletes the second element (vec[1]) vec.erase(std::next(vec.begin())); Alternatively, to remove many elements at once: // ...READ MORE

Jun 10, 2022 in C++ by Damon
 • 4,960 points • 1,643 views
0 votes
1 answer

please help me with max_element function in c++ stl

You can substitute max for *max eleme ...READ MORE

Jun 27, 2022 in C++ by Damon
 • 4,960 points • 882 views
0 votes
0 answers

Why use #define instead of a variable

What is the purpose of the #define ...READ MORE

Jul 1, 2022 in C++ by Nicholas
 • 7,760 points • 429 views
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