C++ Archives - Page 48 of 68

Why can’t I make a vector of references?

When I do this: std::vector<int> hello; Everything works great. However, when I make it a vector of references instead: std::vector<int &> hello; I ...

May 7, 2022
0 Comments

How to convert int to QString?

Is there a QString function which takes an int and outputs it as a QString? 9 Answers 9

May 7, 2022
0 Comments

How to check that an element is in a std::set?

How do you check that an element is in a set? Is there a simpler equivalent of the following code: myset.find(x) != myset.end() ...

May 7, 2022
0 Comments

How to get rid of `deprecated conversion from string constant to ‘char*’` warnings in GCC?

So I’m working on an exceedingly large codebase, and recently upgraded to gcc 4.3, which now triggers this warning: warning: deprecated conversion from ...

May 7, 2022
0 Comments

C++ template typedef

I have a class template<size_t N, size_t M> class Matrix { // .... }; I want to make a typedef which creates a ...

May 7, 2022
0 Comments

What is std::promise?

I’m fairly familiar with C++11’s std::thread, std::async and std::future components (e.g. see this answer), which are straight-forward. However, I cannot quite grasp what ...

May 7, 2022
0 Comments

Why use pointers? [closed]

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, ...

May 6, 2022
0 Comments

Is C++ context-free or context-sensitive?

I often hear claims that C++ is a context-sensitive language. Take the following example: a b(c); Is this a variable definition or a ...

May 6, 2022
0 Comments

How do I print the full value of a long string in gdb?

I want to print the full length of a C-string in GDB. By default it’s being abbreviated, how do I force GDB to ...

May 6, 2022
0 Comments

#pragma once vs include guards? [duplicate]

This question already has answers here: Is #pragma once a safe include guard? (15 answers) Closed 2 years ago. I’m working on a ...

May 6, 2022
0 Comments