From bf66df1a16461ef1ee50510803a3097914ffcb82 Mon Sep 17 00:00:00 2001 From: Hunter Kvalevog Date: Mon, 14 Sep 2026 17:15:13 -0500 Subject: Add rustlings --- rustlings/exercises/13_error_handling/errors3.rs | 31 ++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 rustlings/exercises/13_error_handling/errors3.rs (limited to 'rustlings/exercises/13_error_handling/errors3.rs') diff --git a/rustlings/exercises/13_error_handling/errors3.rs b/rustlings/exercises/13_error_handling/errors3.rs new file mode 100644 index 0000000..8e8c38a --- /dev/null +++ b/rustlings/exercises/13_error_handling/errors3.rs @@ -0,0 +1,31 @@ +// This is a program that is trying to use a completed version of the +// `total_cost` function from the previous exercise. It's not working though! +// Why not? What should we do to fix it? + +use std::num::ParseIntError; + +// Don't change this function. +fn total_cost(item_quantity: &str) -> Result { + let processing_fee = 1; + let cost_per_item = 5; + let qty = item_quantity.parse::()?; + + Ok(qty * cost_per_item + processing_fee) +} + +// TODO: Fix the compiler error by changing the signature and body of the +// `main` function. +fn main() { + let mut tokens = 100; + let pretend_user_input = "8"; + + // Don't change this line. + let cost = total_cost(pretend_user_input)?; + + if cost > tokens { + println!("You can't afford that many!"); + } else { + tokens -= cost; + println!("You now have {tokens} tokens."); + } +} -- cgit v1.2.3