diff options
Diffstat (limited to 'src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access')
3 files changed, 34 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.lock b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.lock new file mode 100644 index 000000000..68e3c5967 --- /dev/null +++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "arrays" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.toml b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.toml new file mode 100644 index 000000000..96be3e2b1 --- /dev/null +++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "arrays" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/src/main.rs b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/src/main.rs new file mode 100644 index 000000000..b634c9378 --- /dev/null +++ b/src/doc/book/listings/ch03-common-programming-concepts/no-listing-15-invalid-array-access/src/main.rs @@ -0,0 +1,22 @@ +use std::io; + +fn main() { + let a = [1, 2, 3, 4, 5]; + + println!("Please enter an array index."); + + let mut index = String::new(); + + io::stdin() + .read_line(&mut index) + .expect("Failed to read line"); + + let index: usize = index + .trim() + .parse() + .expect("Index entered was not a number"); + + let element = a[index]; + + println!("The value of the element at index {index} is: {element}"); +} |