From c46d8bdf95c9a2025ee943feb208102a94b25ee6 Mon Sep 17 00:00:00 2001 From: mo8it Date: Wed, 26 Jun 2024 15:44:33 +0200 Subject: errors3 solution --- solutions/13_error_handling/errors3.rs | 33 ++++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) (limited to 'solutions/13_error_handling/errors3.rs') diff --git a/solutions/13_error_handling/errors3.rs b/solutions/13_error_handling/errors3.rs index 4e18198..63f4aba 100644 --- a/solutions/13_error_handling/errors3.rs +++ b/solutions/13_error_handling/errors3.rs @@ -1 +1,32 @@ -// Solutions will be available before the stable release. Thank you for testing the beta version 🥰 +// 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