rc/main.rs* and take a look:
-->
<p>では、<em>src/main.rs</em>を開いて見てみましょう。</p>
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<span class="filename">Filename: src/main.rs</span>
-->
<p><span class="filename">ファイル名: src/main.rs</span></p>
<pre><pre class="playground"><code class="language-rust">fn main() {
    println!(&quot;Hello, world!&quot;);
}</code></pre></pre>
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Cargo has generated a “Hello, world!” program for you, just like the one we
wrote in Listing 1-1! So far, the differences between our proje