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Welcome to the Palindromic Number in Rust page! Here, you'll find the source code for this program as well as a description of how the program works.
use std::env::args;
use std::process::exit;
use std::str::FromStr;
use std::fmt::Display;
fn usage() -> ! {
println!("Usage: please input a non-negative integer");
exit(0);
}
fn parse_int<T: FromStr>(s: &str) -> Result<T, <T as FromStr>::Err> {
s.trim().parse::<T>()
}
fn is_palindromic_number<T: Display>(n: T) -> bool {
// Source: https://stackoverflow.com/questions/24542115/how-to-index-a-string-in-rust
// Convert number to string
let s: String = n.to_string();
// Check if palindrome by comparing left half of string with reversed right half of string
let half_s_len: usize = s.len() / 2;
s.chars().take(half_s_len).eq(s.chars().rev().take(half_s_len))
}
fn main() {
let mut args = args().skip(1);
// Convert 1st command-line argument to integer
let n: u32 = args
.next()
.and_then(|s| parse_int(&s).ok())
.unwrap_or_else(|| usage());
// Determine if palindromic number and display result
println!("{}", is_palindromic_number::<u32>(n));
}
Palindromic Number in Rust was written by:
If you see anything you'd like to change or update, please consider contributing.
Note: The solution shown above is the current solution in the Sample Programs repository as of May 08 2023 19:53:07. The solution was first committed on Apr 09 2023 10:36:45. As a result, documentation below may be outdated.
No 'How to Implement the Solution' section available. Please consider contributing.
No 'How to Run the Solution' section available. Please consider contributing.