updated README.md

nsclass · Feb 8, 2023 · 5394ec8 · 5394ec8
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 # Rust Simple Text Calculator #
 
+
+## Examples
+
+```rust
+let input = "1 + 2 * (3 + 4) / 2"; // expected 1234+*2/+
+let (result, _trace_details) = calculate_str(input, true).unwrap();
+assert_eq!(result, 8.);
+```