C++ Archives - Page 53 of 68

How do I use arrays in C++?

C++ inherited arrays from C where they are used virtually everywhere. C++ provides abstractions that are easier to use and less error-prone (std::vector<T> ...

May 3, 2022
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C++ multiline string literal

Is there any way to have multi-line plain-text, constant literals in C++, à la Perl? Maybe some parsing trick with #includeing a file? ...

May 3, 2022
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When to use extern in C++

I’m reading “Think in C++” and it just introduced the extern declaration. For example: extern int x; extern float y; I think I ...

May 3, 2022
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What is an unsigned char?

In C/C++, what an unsigned char is used for? How is it different from a regular char? 16 s 16 In C++, there ...

May 3, 2022
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What is the most effective way to get the index of an iterator of an std::vector?

I’m iterating over a vector and need the index the iterator is currently pointing at. AFAIK this can be done in two ways: ...

May 3, 2022
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error: request for member ‘..’ in ‘..’ which is of non-class type

I have a class with two constructors, one that takes no arguments and one that takes one argument. Creating objects using the constructor ...

May 2, 2022
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Typedef function pointer?

I’m learning how to dynamically load DLL’s but what I don’t understand is this line typedef void (*FunctionFunc)(); I have a few questions. ...

May 2, 2022
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What are the main purposes of using std::forward and which problems it solves?

In perfect forwarding, std::forward is used to convert the named rvalue references t1 and t2 to unnamed rvalue references. What is the purpose ...

May 2, 2022
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GCC -fPIC option

I have read about GCC’s Options for Code Generation Conventions, but could not understand what “Generate position-independent code (PIC)” does. Please give an ...

May 2, 2022
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Programmatically find the number of cores on a machine

Is there a way to determine how many cores a machine has from C/C++ in a platform-independent way? If no such thing exists, ...

May 2, 2022
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