Build Cryptography And Use It As WASM

Download cryptography library and build for wasm Download cryptography source code at GitHub, cryptopp. Go to cryptopp folder which contains GNUmakefile. Build it to generate C++ library and execute file. make static dynamic cryptest.exe Create a new folder build and move all generated files into it. mv *.o *.so *.a Read more…

std::thread and std::mutex

std::thread #include <iostream> #include <thread> #include <chrono> void f1(int n) { for (int i = 0; i < 5; ++i) { std::cout << “function f1 executing\n”; ++n; std::this_thread::sleep_for(std::chrono::milliseconds(10)); } } void f2(int& n) { for (int i = 0; i < 5; ++i) { std::cout << “function f2 executing\n”; ++n; Read more…

File IO Between QFile And std fstream

The article show demoes about use ifstream to read file written by qfile and use qfile to read file written by ofstream. Use ifstream to read file written by QFile #include <QCoreApplication> #include <QString> #include <QFile> #include <iostream> #include <fstream> int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); QString Read more…

The Stability Of Sorting Algorithm

If two numbers are equal and the relative positions are not changed after sorting, we think the sorting algorithm is stable. Stable sort algorithm: bubble sort, insert sort and merge sort. Unstable sort algorithm: quick sort, heap sort. Introduce an unstable sort algorithm quick sort. Its core thought is divide Read more…

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