Tag: C++
All the articles with the tag "C++".
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How to Get the Size of a File in C++
Get a file's size in C++ with std::filesystem::file_size, or with seekg and tellg on older compilers. Includes error handling and formatting bytes as KB and MB.
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How to Compare Floating-Point Numbers in C++ (Why == Fails)
Why 0.1 + 0.2 != 0.3 in C++, and how to compare doubles correctly with an epsilon tolerance. Includes a reusable almostEqual function and when exact == is fine.
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cin vs getline in C++: Why getline Gets Skipped
Why does getline get skipped after cin >>? Learn the difference between cin extraction and getline, what the leftover newline does, and how to fix it for good.
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C++ Input Validation: Handling Bad cin Input Without Crashing
Updated:Validate numeric input in C++ with cin.fail(), cin.clear() and cin.ignore(). Stop infinite loops when the user types letters, and build a reusable input function.