Environment to write code:

We need an environment to write and compile(run) our C++ code. To write code, we need a text editor. To compile our code, we need a compiler. The compiler converts our code into machine understandable code.

Compiler:

Integrated Development Environment (IDE):

Note: There are many Integrated Development Environments (IDEs) which are available online but they have limited functionality. For better experience, you have to download IDEs listed above.

After setting up the environment, open the new file. Write the following code and save it with the extension ".cpp"

#include <iostream>
using namespace std;

int main() {
    cout << "Hello, World! ";
    return 0;
}

Flowchart for Code Compilation:

Explanation:

• Source Code

  
  Source code is the code which is written in human readable programming language.



• Preprocessor

  
  Preprocessor does file inclusion, macro substitution, conditional compilation etc. and after preprocessing, the code is sent to compiler for compilation.



• Compiler

  
  The compiler compiles the code and and generate executable file. In case of interpreted languages an intermediate code can be used by the computer.



• Assembler

  
  Assembler converts the assembly code into machine code. Assembler gives .obj file as output.



• Linker

  
  Linker links static libraries with our machine code and makes it executable. Linker gives .exe file as output.

Components of C++ code:

We will understand this code in the next chapter.
Your code should be error free so that it will execute without any error.