How To Convert a Qstring to Hexadecimal in C++? Last Updated : 28 Apr, 2025 Comments Improve Suggest changes Like Article Like Report In CPP Qt5 has a QString class for working with strings. It is very powerful and has numerous methods, A Unicode character string is made available via the QString class. A string is kept as a 16-bit QChar. Unicode 4.0 characters are represented by one QChar each. A QString can be changed, unlike strings in many other programming languages. Now we will convert Qstring in Hexa Decimal values. Conversion Concept We will simply use a Q string and convert it in Hexadecimal using the "toInt" Pre-built Method of Qstring Class then provide an OK pointer to check whether the conversion has been successfully executed. Ok pointer is just used for checking errors it will not affect the conversion of QString int to HexaDecimal. Example C++14 // use the qtcore tool to run this code #include <bits/stdc++.h> using namespace std; int main() { // declaring // the string QString s; // taking input // from user cin >> s; // ok: pointer bool ok; // 16 hexa base int hexa_dec = s.toInt(&ok, 16); if (!ok) { // conversion not done cout << "Conversion failed. Repeat conversion" << endl; } else { // printing the hexadecimal value cout << "your Hexadecimal conversion of given " "QString " << hexa_dec << endl; } return 0; } Output:  s="FF" Your Hexadecimal Conversion of given QString 255 //Pointer 'OK' is true Conclusion In QString For storing unprocessed bytes and conventional 8-bit "0"-terminated Strings, It offers the QByteArray class in addition to QString. QString is the class that should be used for the majority of applications. The Qt API uses it extensively, and the support for Unicode assures that your apps will be simple to translate in the event that you ever wish to broaden the market for your product. When storing raw binary data and memory conservation is crucial, QByteArray is the most appropriate choice in these two situations (For Example with Qt for Embedded Linux). Comment More infoAdvertise with us Next Article How To Convert a Qstring to Hexadecimal in C++? divyanshojha2003 Follow Improve Article Tags : Technical Scripter C++ Technical Scripter 2022 C++ Conversion Programs Practice Tags : CPP Similar Reads How to convert Binary to Hexadecimal? A number system is a way of expressing numbers using a consistent set of symbols or digits. The most common number systems are based on different "bases" or "radices," which determine how numbers are represented.Here are some common types of number systems:Decimal Number System (base 10; uses digits 6 min read Strings in C++ and How to Create them? Strings in C++ are used to store text or sequences of characters. 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