From ea95516537b9ef2c9badd01abcf72f20066f9c55 Mon Sep 17 00:00:00 2001
From: Ivan Tham <pickfire@riseup.net>
Date: Mon, 2 Nov 2020 01:28:05 +0800
Subject: Add help command

Close #41
---
 src/main.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
index bc22ce2..7086d15 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -193,7 +193,9 @@ fn parse_arguments() -> Configuration {
 
 pub fn eval_math_expression(input: &str, prev_ans: Option<f64>) -> Result<f64, CalcError> {
     let input = input.trim();
-    let input = input.replace(" ", "");
+    if input == "help" {
+        return Err(CalcError::Help);
+    }
     if input.is_empty() {
         return Ok(0.);
     }
-- 
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