Redirecting the Standard Input and Output Streams

Understand how to redirect the standard input and output streams in D programming through command line operators. This lesson helps you learn how to send program output to files, read input from files, and pipe programs together, which are essential skills for effective file handling and stream management.

We'll cover the following...

- Using > to redirect standard output to file
- Using < to redirect standard input from file
- Redirecting both standard streams
- Piping programs with operator |

All of the programs that we have seen so far have interacted through stdin and stdout, the standard input and output streams. Input and output functions like readf and writeln operate on these streams by default. While using these streams, we assumed that the standard input comes from the keyboard and that the standard output goes to the screen.

We will start writing programs that deal with files in the next lesson. We will see that, just like the standard input and output streams, files are character streams as well; they are used in almost the same way as stdin and stdout. But before seeing how files are accessed from within programs, we will get familiar with how the ...

1.Getting Started With D

2.Variables and User Input

3.Arithmetic and Logical Operations on Data Types

4.Conditional Statements and Loops

5.Arrays, Characters and Strings

6.File Handling in D

7.Literals and enum

8.Formatted Output and Input

9.foreach Loop and switch-case Statement

10.Functions

11.Immutability

12.Value Types and Reference Types

13.Function Parameters

14.Program Environment

15.Exceptions and scope

16.assert and enforce Statements

17.Unit Testing

18.Contract Programming

Redirecting the Standard Input and Output Streams