C++ Archives - Page 61 of 68

Appending a vector to a vector [duplicate]

This question already has answers here: Concatenating two std::vectors (26 answers) Closed 6 years ago. Assuming I have 2 standard vectors: vector<int> a; ...

April 22, 2022
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What is a segmentation fault?

What is a segmentation fault? Is it different in C and C++? How are segmentation faults and dangling pointers related? 17 s 17 ...

April 22, 2022
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Why is my program slow when looping over exactly 8192 elements?

Here is the extract from the program in question. The matrix img has the size SIZE×SIZE, and is initialized at: img[j]...

April 22, 2022
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What are the rules for calling the base class constructor?

What are the C++ rules for calling the base class constructor from a derived class? For example, I know in Java, you must ...

April 22, 2022
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What should main() return in C and C++?

What is the correct (most efficient) way to define the main() function in C and C++ — int main() or void main() — ...

April 21, 2022
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Why isn’t sizeof for a struct equal to the sum of sizeof of each member?

Why does the sizeof operator return a size larger for a structure than the total sizes of the structure’s members? 12 s 12 ...

April 21, 2022
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What is a “cache-friendly” code?

What is the difference between “cache unfriendly code” and the “cache friendly” code? How can I make sure I write cache-efficient code? 9 ...

April 20, 2022
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What is object slicing?

In c++ what is object slicing and when does it occur? 18 s 18 Most answers here fail to explain what the actual ...

April 20, 2022
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C++ Singleton design pattern

Recently I’ve bumped into a realization/implementation of the Singleton design pattern for C++. It has looked like this (I have adopted it from ...

April 20, 2022
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Concatenating two std::vectors

How do I concatenate two std::vectors? 26 s 26 vector1.insert( vector1.end(), vector2.begin(), vector2.end() );

April 19, 2022
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