11 lines
1.5 KiB
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11 lines
1.5 KiB
HTML
<!doctype html><html lang="en"><meta charset="utf-8"><title>Collections and repeated work</title><h1>Collections and repeated work</h1><p>15-minute session: read for 3 minutes, trace for 3, experiment for 7, and complete the check for 2. Spend longer whenever you need.</p><p>A collection stores related values. The loop visits 1, 2, and 3, updating the total from 0 to 1, then 3, then 6. Record this trace rather than guessing. Identify the first and last valid positions in this language: Pascal can declare a 1-based array, while many other examples use zero-based containers. Add another value and update the bounds correctly. Explain what an empty collection should produce.</p><p>C begins at <code>main</code>. <code>stdio.h</code> declares output functions; <code>puts</code> adds a newline. Semicolons terminate statements. An integer and a pointer are different kinds of value.</p><pre><code class="language-c">#include <stdio.h>
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#include <assert.h>
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int main(void) {
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int minutes[] = {1, 2, 3};
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int total = 0;
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for (size_t i = 0; i < sizeof minutes / sizeof minutes[0]; ++i) total += minutes[i];
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printf("%d\n", total);
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return 0;
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}
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</code></pre><p><strong>Expected result:</strong> <code>6</code></p><h3>Practice and evidence</h3><p>Keep three notes: your prediction, the actual result, and why they match or differ. The completion check grades understanding; the practice task builds skill.</p><p><a href="https://gcc.gnu.org/onlinedocs/gcc/Standards.html">Language reference</a></p></html> |