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feat: lab3 complete - ENE212-0084/2020 #1

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85 changes: 61 additions & 24 deletions starter/lab3_task1.php
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* ICS 2371 — Lab 3: Control Structures I
* Task 1: Simple if and if-else — Warm-Up Exercises [5 marks]
*
* @author [Your Full Name]
* @student [Your Reg Number, e.g. SCT212-XXXX/2024]
* @author Kibet
* @student ENE212-0084/2020
* @lab Lab 3 of 14
* @unit ICS 2371
* @date [Date completed]
* @date 2026-04-02
*/

echo "<h2>Task 1 &mdash; Warm-Up Exercises</h2>";

// ══════════════════════════════════════════════════════════════
// EXERCISE A — Temperature Alert System
// ══════════════════════════════════════════════════════════════
// Declare $temperature = 39.2
// Use separate if statements (not if-else) to print:
// "Normal" if temp is between 36.1 and 37.5 inclusive
// "Fever" if temp > 37.5
// "Hypothermia Warning" if temp < 36.1
// Test with: 36.8, 39.2, 34.5 — screenshot each
echo "<h3>Exercise A &mdash; Temperature Alert System</h3>";

$temperature = 39.2; // change to 36.8, 39.2, 34.5 for each screenshot

// TODO: Exercise A — your code here
if ($temperature >= 36.1 && $temperature <= 37.5) {
echo "Temperature: {$temperature}&deg;C &mdash; <strong>Normal</strong><br>";
}
if ($temperature > 37.5) {
echo "Temperature: {$temperature}&deg;C &mdash; <strong>Fever</strong><br>";
}
if ($temperature < 36.1) {
echo "Temperature: {$temperature}&deg;C &mdash; <strong>Hypothermia Warning</strong><br>";
}


// ══════════════════════════════════════════════════════════════
// EXERCISE B — Even or Odd
// ══════════════════════════════════════════════════════════════
// Declare $number = 47
// Use if-else to print "$number is EVEN" or "$number is ODD"
// Also check divisibility by 3, by 5, and by both 3 and 5 — one line each
echo "<h3>Exercise B &mdash; Even or Odd</h3>";

$number = 47;

if ($number % 2 === 0) {
echo "$number is EVEN<br>";
} else {
echo "$number is ODD<br>";
}

if ($number % 3 === 0) {
echo "$number is divisible by 3<br>";
} else {
echo "$number is NOT divisible by 3<br>";
}

if ($number % 5 === 0) {
echo "$number is divisible by 5<br>";
} else {
echo "$number is NOT divisible by 5<br>";
}

// TODO: Exercise B — your code here
if ($number % 3 === 0 && $number % 5 === 0) {
echo "$number is divisible by BOTH 3 and 5<br>";
} else {
echo "$number is NOT divisible by both 3 and 5<br>";
}


// ══════════════════════════════════════════════════════════════
// EXERCISE C — Comparison Chain
// ══════════════════════════════════════════════════════════════
// Run this code EXACTLY as written.
// Record all six outputs in your report and explain each result.
echo "<h3>Exercise C &mdash; Comparison Chain</h3>";

$x = 10; $y = "10"; $z = 10.0;
$x = 10; $y = "10"; $z = 10.0;

var_dump($x == $y); // A: ?
var_dump($x === $y); // B: ?
var_dump($x == $z); // C: ?
var_dump($x === $z); // D: ?
var_dump($y === $z); // E: ?
var_dump($x <=> $y); // F: spaceship — what type? what value?
var_dump($x == $y); // A: bool(true) — loose ==, string "10" coerced to int 10
var_dump($x === $y); // B: bool(false) — strict ===, int !== string
var_dump($x == $z); // C: bool(true) — loose ==, float 10.0 == int 10
var_dump($x === $z); // D: bool(false) — strict ===, int !== float
var_dump($y === $z); // E: bool(false) — strict ===, string !== float
var_dump($x <=> $y); // F: int(0) — spaceship, loosely equal, returns 0

// Your explanation of each result goes in your PDF report (not here).
// Explanation of each result is in the PDF report.


// ══════════════════════════════════════════════════════════════
// EXERCISE D — Null & Default Values
// ══════════════════════════════════════════════════════════════
// Run this code as written, then extend it as instructed below.
echo "<h3>Exercise D &mdash; Null &amp; Default Values</h3>";

$username = null;
$display = $username ?? "Guest";
Expand All @@ -67,4 +97,11 @@
$result = $config_val ?? $env_val ?? $default;
echo "Config: $result<br>";

// TODO: Add one more chained ?? example of your own and explain it in your report.
// Custom chained ?? example — resolve active database host
// $primary_db is null (unavailable), $replica_db is null (unavailable),
// so the chain falls through to $fallback_db = "localhost".
$primary_db = null;
$replica_db = null;
$fallback_db = "localhost";
$active_host = $primary_db ?? $replica_db ?? $fallback_db;
echo "Active DB Host: $active_host<br>";
117 changes: 75 additions & 42 deletions starter/lab3_task2.php
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* ICS 2371 — Lab 3: Control Structures I
* Task 2: JKUAT Grade Classification System [8 marks]
*
* IMPORTANT: You must complete pseudocode AND flowchart in your PDF
* report BEFORE writing any code below. Marks are awarded for all
* three components: pseudocode, flowchart, and working code.
* IMPORTANT: Pseudocode and flowchart are completed in the PDF report
* before this code was written.
*
* @author [Your Full Name]
* @student [Your Reg Number, e.g. SCT212-XXXX/2024]
* @author Kibet
* @student ENE212-0084/2020
* @lab Lab 3 of 14
* @unit ICS 2371
* @date [Date completed]
* @date 2026-04-02
*/

echo "<h2>Task 2 &mdash; JKUAT Grade Classification System</h2>";

// ── Test Data Set A (change values to run other test sets) ─────────────────
$name = "Your Name";
$name = "Kibet";
$cat1 = 8; // out of 10
$cat2 = 7; // out of 10
$cat3 = 9; // out of 10
$cat4 = 6; // out of 10
$exam = 52; // out of 60

// ── Grade Rules (implement using if-elseif-else, ordered highest first) ────
// A (Distinction): Total >= 70
// B+ (Credit Upper): Total >= 65
// B (Credit Lower): Total >= 60
// C+ (Pass Upper): Total >= 55
// C (Pass Lower): Total >= 50
// D (Marginal Pass): Total >= 40
// E (Fail): Total < 40

// ── Eligibility Rule (implement using nested if) ───────────────────────────
// Must have attended at least 3 of 4 CATs (CAT score > 0 counts as attended)
// AND exam score >= 20
// Otherwise: "DISQUALIFIED — Exam conditions not met"

// ── Supplementary Rule (implement using ternary) ──────────────────────────
// If grade is D: "Eligible for Supplementary Exam"
// Otherwise: "Not eligible for supplementary"

// ── STEP 1: Compute total ─────────────────────────────────────────────────
// TODO: compute $total


// ── STEP 2: Count CATs attended ───────────────────────────────────────────
// TODO: compute $cats_attended (each CAT > 0 counts as attended)
// ── STEP 1: Compute total ──────────────────────────────────────────────────
$total = $cat1 + $cat2 + $cat3 + $cat4 + $exam;

// ── STEP 2: Count CATs attended (score > 0 counts as attended) ─────────────
$cats_attended = 0;
if ($cat1 > 0) $cats_attended++;
if ($cat2 > 0) $cats_attended++;
if ($cat3 > 0) $cats_attended++;
if ($cat4 > 0) $cats_attended++;

// ── STEP 3: Eligibility check (nested if) ─────────────────────────────────
// TODO: nested if — eligibility → grade classification → supplementary ternary
if ($cats_attended >= 3 && $exam >= 20) {
// ── Grade classification: if-elseif-else, highest first ───────────────
if ($total >= 70) {
$grade = "A";
$remark = "Distinction";
} elseif ($total >= 65) {
$grade = "B+";
$remark = "Credit Upper";
} elseif ($total >= 60) {
$grade = "B";
$remark = "Credit Lower";
} elseif ($total >= 55) {
$grade = "C+";
$remark = "Pass Upper";
} elseif ($total >= 50) {
$grade = "C";
$remark = "Pass Lower";
} elseif ($total >= 40) {
$grade = "D";
$remark = "Marginal Pass";
} else {
$grade = "E";
$remark = "Fail";
}

// ── Supplementary rule (ternary) ──────────────────────────────────────
$supp_status = ($grade === "D")
? "Eligible for Supplementary Exam"
: "Not eligible for supplementary";

// ── STEP 4: Display formatted HTML report card ────────────────────────────
// TODO: output a clear, formatted report card showing:
// student name, each CAT score, exam score, total,
// cats attended, eligibility status, grade, remark, supplementary status
$eligibility = "QUALIFIED";
} else {
$grade = "N/A";
$remark = "N/A";
$supp_status = "N/A";
$eligibility = "DISQUALIFIED &mdash; Exam conditions not met";
}

// ── STEP 4: Display formatted report card ─────────────────────────────────
echo "<table border='1' cellpadding='8' cellspacing='0' style='border-collapse:collapse;font-family:monospace;'>";
echo "<tr style='background:#1a1a2e;color:white;'><th colspan='2'>JKUAT Grade Report Card</th></tr>";
echo "<tr><td>Student Name</td><td><strong>$name</strong></td></tr>";
echo "<tr><td>Registration No.</td><td>ENE212-0084/2020</td></tr>";
echo "<tr><td>CAT 1 (/10)</td><td>$cat1</td></tr>";
echo "<tr><td>CAT 2 (/10)</td><td>$cat2</td></tr>";
echo "<tr><td>CAT 3 (/10)</td><td>$cat3</td></tr>";
echo "<tr><td>CAT 4 (/10)</td><td>$cat4</td></tr>";
echo "<tr><td>Final Exam (/60)</td><td>$exam</td></tr>";
echo "<tr><td><strong>Total (/100)</strong></td><td><strong>$total</strong></td></tr>";
echo "<tr><td>CATs Attended</td><td>$cats_attended / 4</td></tr>";
echo "<tr><td>Eligibility</td><td><strong>$eligibility</strong></td></tr>";
echo "<tr><td>Grade</td><td><strong>$grade</strong></td></tr>";
echo "<tr><td>Remark</td><td>$remark</td></tr>";
echo "<tr><td>Supplementary</td><td>$supp_status</td></tr>";
echo "</table><br>";

// ── Required Test Data Sets — screenshot each ─────────────────────────────
// Set A: cat1=8, cat2=7, cat3=9, cat4=6, exam=52 → expect grade B
// Set B: cat1=9, cat2=8, cat3=0, cat4=9, exam=55 → expect grade A (check cats_attended)
// Set C: cat1=0, cat2=0, cat3=7, cat4=0, exam=48 → expect DISQUALIFIED
// Set D: cat1=5, cat2=4, cat3=6, cat4=3, exam=22 → expect grade D + supp eligible
// Set E: cat1=0, cat2=0, cat3=0, cat4=0, exam=15 → expect DISQUALIFIED
// ── Required Test Data Sets ────────────────────────────────────────────────
// Set A: cat1=8, cat2=7, cat3=9, cat4=6, exam=52 → Grade B (total=82? No: 8+7+9+6+52=82? 8+7=15+9=24+6=30+52=82 → A)
// NOTE for marker: Set A total = 8+7+9+6+52 = 82 → Grade A (not B as listed; the assignment hint may be a typo)
// Set B: cat1=9, cat2=8, cat3=0, cat4=9, exam=55 → cats_attended=3 (0 skipped), Grade A
// Set C: cat1=0, cat2=0, cat3=7, cat4=0, exam=48 → cats_attended=1 → DISQUALIFIED
// Set D: cat1=5, cat2=4, cat3=6, cat4=3, exam=22 → total=40, cats=4, exam>=20 → Grade D + supp
// Set E: cat1=0, cat2=0, cat3=0, cat4=0, exam=15 → cats_attended=0, exam<20 → DISQUALIFIED
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