C++ Archives - Page 38 of 68

What is the purpose of std::launder?

P0137 introduces the function template std::launder and makes many, many changes to the standard in the sections concerning unions, lifetime, and pointers. What ...

May 15, 2022
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Fast ceiling of an integer division in C / C++

Given integer values x and y, C and C++ both return as the quotient q = x/y the floor of the floating point ...

May 15, 2022
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Returning multiple values from a C++ function

Is there a preferred way to return multiple values from a C++ function? For example, imagine a function that divides two integers and ...

May 15, 2022
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Printing 1 to 1000 without loop or conditionals

Locked. This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new ...

May 15, 2022
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Throwing exceptions from constructors

I’m having a debate with a co-worker about throwing exceptions from constructors, and thought I would like some feedback. Is it OK to ...

May 15, 2022
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Can we have functions inside functions in C++?

I mean something like: int main() { void a() { // code } a(); return 0; } 12 Answers 12

May 14, 2022
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How do I build a graphical user interface in C++? [closed]

It’s difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably ...

May 14, 2022
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convert a char* to std::string

I need to use an std::string to store data retrieved by fgets(). To do this I need to convert the char* return value ...

May 14, 2022
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What is the difference between private and protected members of C++ classes?

What is the difference between private and protected members in C++ classes? I understand from best practice conventions that variables and functions which ...

May 14, 2022
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How to detect reliably Mac OS X, iOS, Linux, Windows in C preprocessor? [duplicate]

This question already has answers here: How do I check OS with a preprocessor directive? (16 answers) Closed 2 years ago. The community ...

May 14, 2022
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