C++ Archives - Page 6 of 68

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Default template arguments for function templates

Why are default template arguments only allowed on class templates? Why can’t we define a default type in a member function template? For ...

June 2, 2022
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C++, Programming

IT Nursery

Implicit type conversion rules in C++ operators

I want to be better about knowing when I should cast. What are the implicit type conversion rules in C++ when adding, multiplying, ...

June 2, 2022
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C++, Programming

IT Nursery

“No newline at end of file” compiler warning

What is the reason for the following warning in some C++ compilers? No newline at end of file Why should I have an ...

June 2, 2022
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C++, Programming

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Is it better to use std::memcpy() or std::copy() in terms to performance?

Is it better to use memcpy as shown below or is it better to use std::copy() in terms to performance? Why? char *bits ...

June 1, 2022
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C++, Programming

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How do I clear the std::queue efficiently?

I am using std::queue for implementing JobQueue class. ( Basically this class process each job in FIFO manner). In one scenario, I want ...

June 1, 2022
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C++, Programming

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Rounding up to the nearest multiple of a number

OK – I’m almost embarrassed posting this here (and I will delete if anyone votes to close) as it seems like a basic ...

June 1, 2022
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C++, Programming

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std::cin input with spaces?

#include <string> std::string input; std::cin >> input; The user wants to enter “Hello World”. But cin fails at the space between the two ...

June 1, 2022
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C++, Programming

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Is inline assembly language slower than native C++ code?

I tried to compare the performance of inline assembly language and C++ code, so I wrote a function that add two arrays of ...

June 1, 2022
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C++, Programming

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Which Boost features overlap with C++11?

I put my C++ skills on the shelf several years ago and it seems now, when I need them again, the landscape has ...

June 1, 2022
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C++, Programming

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When vectors are allocated, do they use memory on the heap or the stack?

Are all of the following statements true? vector<Type> vect; //allocates vect on stack and each of the Type (using std::allocator) also will be ...

June 1, 2022
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