C++ - Hello World

C++'s Hello World is similar to Go's (golang), but there are some differences.  The similarity is that both C++ and Go create a file that is executed natively on the platform it is compiled to.  Also both C++ and Go follow a procedure of compile then link.  The main differences, for the Hello World program, are in the expressiveness and the syntax.  Writing hello world in C++ requires the following steps:

Step 1: Create a C++ source file

The source file for Hello World thus looks like the following:

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#include <iostream>

using namespace std;

int main(int argc, const char** argv){

cout<<"Hello World in C++ from ecocrypt.blogspot.com"<<endl;

return 0;

}

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Save this to any file name you like, but typically, you will have to have a .cpp extension on the end of the file name.  A good name to choose for this example would be helloworld.cpp.

Step 2: Compile the C++ Source

At a command prompt, type the c++ compiler-linker command:

prompt % c++ HelloWorld.cpp

This will typically do a 2 step process of compiling and linking.  Therefore no intermediate object files will be created.  The result of this will be to produce an output file called a.out, or a.exe. 

Step 3: Running HelloWorld

At the command prompt, type:

prompt % a.out      (or a.exe on windows)

Hello World in C++ from ecocrypt.blogspot.com

Congratulate yourself!  You have successfully installed a C++ compiler, and created a simple hello world executable.