C++ Archives - Page 67 of 68

Why are elementwise additions much faster in separate loops than in a combined loop?

Suppose a1, b1, c1, and d1 point to heap memory, and my numerical code has the following core loop. const int n = ...

April 10, 2022
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What is The Rule of Three?

What does copying an object mean? What are the copy constructor and the copy assignment operator? When do I need to declare them ...

April 10, 2022
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What is the difference between #include and #include “filename”?

In the C and C++ programming languages, what is the difference between using angle brackets and using quotes in an include statement, as ...

April 10, 2022
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When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?

What are the proper uses of: static_cast dynamic_cast const_cast reinterpret_cast C-style cast (type)value Function-style cast type(value) How does one decide which to use ...

April 10, 2022
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How do you set, clear, and toggle a single bit?

How do you set, clear, and toggle a bit? 2 27 Setting a bit Use the bitwise OR operator (|) to set a ...

April 10, 2022
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Why is “using namespace std;” considered bad practice?

I’ve been told by others that writing using namespace std; in code is wrong, and that I should use std::cout and std::cin directly ...

April 10, 2022
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How do I iterate over the words of a string?

I’m trying to iterate over the words of a string. The string can be assumed to be composed of words separated by whitespace. ...

April 10, 2022
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What does the explicit keyword mean?

What does the explicit keyword mean in C++? 10 The compiler is allowed to make one implicit conversion to resolve the parameters to ...

April 10, 2022
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What are the differences between a pointer variable and a reference variable in C++?

I know references are syntactic sugar, so code is easier to read and write. But what is the difference between a pointer variable ...

April 9, 2022
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The Definitive C++ Book Guide and List

This question’s answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. ...

April 9, 2022
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