Found 7350 Articles for C++

C++ is a widely used programming language that is used for writing large-scale commercial applications for end-users. Some of the major applications built using C++ by major software vendors and giants are −Google − Google file system, Google Chromium browser, and MapReduce large cluster data processing are all written in C++.Mozilla − Mozilla Firefox and Thunderbird email chat client are both written using C++.MySQL − MySQL, an open source DBMS is written using C++.Microsoft − Many windows apps that you regularly use are written in C++.Rockstar Games − Almost all major game companies use C++ due to its sheer speed ... Read More

Object-oriented programming (OOP) is a programming paradigm based on the concept of "objects", which may contain data, in the form of fields, often known as attributes; and code, in the form of procedures, often known as methods. For example, a person is an object which has certain properties such as height, gender, age, etc. It also has certain methods such as move, talk, and so on.ObjectThis is the basic unit of object-oriented programming. That is both data and function that operate on data are bundled as a unit called an object.ClassWhen you define a class, you define a blueprint for ... Read More

C++ is a programming language developed by Bjarne Stroustrup in 1979 at Bell Labs. C++ is regarded as a middle-level language, as it comprises a combination of both high-level and low-level language features. It is a superset of C, and that virtually any legal C program is a legal C++ program. C++ runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX.It is a language that is − Statically typed − A programming language is claimed to use static typing when type checking is performed during compile-time as opposed to run-time. Compiled − A compiled ... Read More

Following are the steps to use native methods.Create a header file (.h file) for a CPP program.Create CPP fileCreate a DLLIn java code, declare the method as native, load the DLL using System.loadLibrary() method and call the method.

To wrap existing C or C++ functionality in Python, there are number of options available, which are: Manual wrapping using PyMethodDef and Py_InitModule, SWIG, Pyrex, ctypes, SIP, Boost.Python, and pybind1. Using the SWIG Module Let’s take a C function and then tune it to python using SWIG. The SWIG stands for “Simple Wrapper Interface Generator”, and it is capable of wrapping C in a large variety of languages like python, PHP, TCL etc. Example Consider simple factorial function fact() in example.c file. /* File : example.c */ #include // calculate factorial int fact(int n) ... Read More

Here is an example in which a simple Python object is wrapped and embedded. We are using  .c for this, c++ has similar steps −class PyClass(object):     def __init__(self):         self.data = []     def add(self, val):         self.data.append(val)     def __str__(self):         return "Data: " + str(self.data) cdef public object createPyClass():     return PyClass() cdef public void addData(object p, int val):     p.add(val) cdef public char* printCls(object p):     return bytes(str(p), encoding = 'utf-8')We compile with cython pycls.pyx (use --cplus for c++) to generate ... Read More

Having entered following command from linux terminal −$ g++ helloworld.cppThe a.out file should be created in the current working directory if the compilation is successful. Check if a.out is created.To execute enter following from command line −$ ./a.outIn most cases, output of your source program is displayed. However, as in your case, error message indicating a.out is not executable is appearing. See the properties of a.out and make it executable (if not already) by following command −$ chmod +x a.outYou may require sudo privilege for this. In all probability this should work. all the bestRead More

To call a JavaScript function from C++, generate a js file, which calls the function. The web page will load the JS and the function runs −int callId = 0; void callFunction() {    // the js file    ofstream fout("generate.js");    fout

The following are the differences between JavaScript and C++.JavaScript is a lightweight, interpreted programming language. It is designed for creating network-centric applications. It is complementary to and integrated with Java. JavaScript is very easy to implement because it is integrated with HTML. It is open and cross-platform.C++ is a middle-level programming language developed by Bjarne Stroustrup starting in 1979 at Bell Labs. It runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX.JavaScript is a scripting whereas C++ is a programming language.C++ program is to be compiled and executed, whereas a script in ... Read More

Namespaces in Python and C++ cannot really be compared. For example, in C++ −// a.h namespace ns {     struct A { .. };     struct B { .. }; }If we were to do this −#include "a.h" using ns::A;The point of that code is to be able to write A unqualified(ie, not having to write ns::A). Now, you might consider a python equivalent as −from a import ABut regardless of the using, the entire a.h header will still be included and compiled, so we would still be able to write ns::B, whereas in the Python version, a.B ... Read More