Beginning Rust: From Novice to Professional

© Carlo Milanesi 2018

Carlo MilanesiBeginning Rusthttps://doi.org/10.1007/978-1-4842-3468-6_17

17. Input/Output and Error Handling

Carlo Milanesi¹ 

(1)

Bergamo, Italy

 

In this chapter, you will learn:

• How to get the arguments from the command line used to launch the program

• How to return a status code to the operating system when exiting the program

• How to get and set the process environment variables

• Techniques and best practices to handle runtime errors

• How to read from the console keyboard and how to write to the console screen

• How primitive types are converted to string

• How to read or write a binary file

• How to read a text file a line at a time

Command-Line Arguments

The most basic form of input of a program is through the command line.

let command_line: ...