From 4dfc11d74ab02ac5765ae5d08fb750c91f4744b4 Mon Sep 17 00:00:00 2001 From: Hunter Kvalevog Date: Fri, 2 Oct 2026 21:53:51 -0500 Subject: rustlings: move to rust/ --- .../solutions/13_error_handling/errors3.rs | 32 ++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 rust/rustlings/solutions/13_error_handling/errors3.rs (limited to 'rust/rustlings/solutions/13_error_handling/errors3.rs') diff --git a/rust/rustlings/solutions/13_error_handling/errors3.rs b/rust/rustlings/solutions/13_error_handling/errors3.rs new file mode 100644 index 0000000..63f4aba --- /dev/null +++ b/rust/rustlings/solutions/13_error_handling/errors3.rs @@ -0,0 +1,32 @@ +// 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) +} + +fn main() -> Result<(), ParseIntError> { + // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ added + let mut tokens = 100; + let pretend_user_input = "8"; + + 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."); + } + + // Added this line to return the `Ok` variant of the expected `Result`. + Ok(()) +} -- cgit v1.2.3