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LWE10266 : Howto write a first version of Hello World with a Microsoft visual Studio compiler


You would like to start from the beginning and write your first programm




To write a HelloWorld application with Microsoft Visual Studio you need to generate a new project. This project has to be generated as a Visual C++ Win32 Win32-console application. (do not use precompiled headers if you want to start from the beginning. Otherwise the following little program will not compile because it needs an extra line #include "stdafx.h")

You write the following in the HelloWorld.cpp file in the editor and start the compilation. (F7 starts the compiler, F5 will compile and run your program)

#include <iostream>
#include <ostream>

int main(void)
  ::std::cout << "Hello world!" << '\n';

Here you use the namespace std without a using statement first.
As an alternative you could write the following, which is exactly the same:

using namespace std;

int main(void)
  cout << "Hello world!" << '\n';

Here the namespace std will be used so the cout does not have to be prefixed with ::std to use it. I think this is easier to read than the previous example.

When this little program runs, you can take whichever C++ book from the shelf and start programming. Creating a GUI (grafical user interface) application is a bit more complex and not platform independant. (Here Java goes further than C/C++ by defining a standard GUI library wich C/C++ does not have)


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