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Amoke Ken - ENE212-0220/2023 #23

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1437df8
Complete Lab 3 — Control Structures I (Tasks 1–4)
amoken Apr 8, 2026
815e5cf
lab 3 submission
amoken Apr 17, 2026
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130 changes: 90 additions & 40 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 [Amoke Ken Odhiambo]
* @student [ENE212-0220/2023]
* @lab Lab 3 of 14
* @unit ICS 2371
* @date [Date completed]
* @date [4rth April 2026]
*/

// ══════════════════════════════════════════════════════════════
// 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

// TODO: Exercise A — your code here
/* Exercise A — Temperature Alert System
*/

// Change value to test 36.8, 39.2, and 34.5
$temperature = 39.2;

// 1. Check for Normal range (inclusive: 36.1 to 37.5)
if ($temperature >= 36.1 && $temperature <= 37.5) {
echo "Normal";
}

// 2. Check for Fever
if ($temperature > 37.5) {
echo "Fever";
}

// 3. Check for Hypothermia Warning
if ($temperature < 36.1) {
echo "Hypothermia Warning";
}


// ══════════════════════════════════════════════════════════════
// 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

// TODO: Exercise B — your code here
$number = 47;

// 1. Even or Odd Check
if ($number % 2 == 0) {
echo "$number is EVEN<br>";
} else {
echo "$number is ODD<br>";
}

// ══════════════════════════════════════════════════════════════
// EXERCISE C — Comparison Chain
// ══════════════════════════════════════════════════════════════
// Run this code EXACTLY as written.
// Record all six outputs in your report and explain each result.
// 2. Divisibility by 3
if ($number % 3 == 0) {
echo "$number is divisible by 3<br>";
}else {
echo "$number is not divisible by 3<br>";
}

$x = 10; $y = "10"; $z = 10.0;
// 3. Divisibility by 5
if ($number % 5 == 0) {
echo "$number is divisible by 5<br>";
}else {
echo "$number is not divisible by 5<br>";
}

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 <=> $y); // F: spaceship — what type? what value?
// 4. Divisibility by both
if ($number % 3 == 0 && $number % 5 == 0) {
echo "$number is divisible by both 3 and 5<br>";
}else {
echo "$number is not divisible by both<br>";
}

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


// ══════════════════════════════════════════════════════════════
// EXERCISE D — Null & Default Values
// ══════════════════════════════════════════════════════════════
// Run this code as written, then extend it as instructed below.
// ==========================================
// Exercise C — Comparison Chain
// ==========================================
$x = 10; // Integer
$y = "10"; // String
$z = 10.0; // Float (Decimal)

echo "<h3>Exercise C Results:</h3>";
echo "<pre>"; // <pre> makes var_dump output easier to read in a browser

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

echo "</pre>";


// ==========================================
// Exercise D — Null & Default Values
// ==========================================
echo "<h3>Exercise D Results:</h3>";

// Part 1: Basic Null Coalescing
$username = null;
$display = $username ?? "Guest";
$display = $username ?? "Guest";
echo "Welcome, $display<br>";

// Chained null coalescing
// Part 2: Chained Null Coalescing
$config_val = null;
$env_val = null;
$default = "system_default";
$result = $config_val ?? $env_val ?? $default;
$env_val = null;
$default = "system_default";
$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.
// Part 3: My Custom Chained Example
// This checks for a user-set theme, then a session theme, then defaults to 'Light'
$user_theme = null;
$session_theme = "Dark Mode";
$fallback_theme = "Light Mode";

$final_theme = $user_theme ?? $session_theme ?? $fallback_theme;

echo "Selected Theme: $final_theme<br>";

?>

101 changes: 57 additions & 44 deletions starter/lab3_task2.php
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* report BEFORE writing any code below. Marks are awarded for all
* three components: pseudocode, flowchart, and working code.
*
* @author [Your Full Name]
* @student [Your Reg Number, e.g. SCT212-XXXX/2024]
* @author [Amoke Ken Odhiambo]
* @student [ENE212-0220/2023]
* @lab Lab 3 of 14
* @unit ICS 2371
* @date [Date completed]
* @date [4rth April 2026]
*/

// ── Test Data Set A (change values to run other test sets) ─────────────────
$name = "Your Name";
$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
/* Task 2 — Grade Classification System */

// ── 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"
// TEST DATA SETS
// Set A: 8, 7, 9, 6, 52
// Set B: 9, 8, 0, 9, 55
// Set C: 0, 0, 7, 0, 48
// Set D: 5, 4, 6, 3, 22
// Set E: 0, 0, 0, 0, 15
$cat1 = 0; $cat2 = 0; $cat3 = 0; $cat4 = 0; $exam = 15;

// ── Supplementary Rule (implement using ternary) ──────────────────────────
// If grade is D: "Eligible for Supplementary Exam"
// Otherwise: "Not eligible for supplementary"
// 1. Calculate Attendance
$cats_attended = 0;
if ($cat1 > 0) $cats_attended++;
if ($cat2 > 0) $cats_attended++;
if ($cat3 > 0) $cats_attended++;
if ($cat4 > 0) $cats_attended++;

// ── STEP 1: Compute total ─────────────────────────────────────────────────
// TODO: compute $total
$total = $cat1 + $cat2 + $cat3 + $cat4 + $exam;
$output_message = "";

// 2. Eligibility Rule (Nested IF)
if ($cats_attended >= 3 && $exam >= 20) {

// 3. Grading Rules (if-elseif-else, highest first)
if ($total >= 70) {
$grade = "A";
$desc = "Distinction";
} elseif ($total >= 65) {
$grade = "B+";
$desc = "Credit Upper";
} elseif ($total >= 60) {
$grade = "B";
$desc = "Credit Lower";
} elseif ($total >= 55) {
$grade = "C+";
$desc = "Pass Upper";
} elseif ($total >= 50) {
$grade = "C";
$desc = "Pass Lower";
} elseif ($total >= 40) {
$grade = "D";
$desc = "Marginal Pass";
} else {
$grade = "E";
$desc = "Fail";
}

// ── STEP 2: Count CATs attended ───────────────────────────────────────────
// TODO: compute $cats_attended (each CAT > 0 counts as attended)
// 4. Supplementary Rule (Ternary)
$supp_msg = ($grade == "D") ? "Eligible for Supplementary Exam" : "Not eligible for supplementary";

$output_message = "Total Score: $total<br>Grade: $grade ($desc)<br>Status: $supp_msg";

// ── STEP 3: Eligibility check (nested if) ─────────────────────────────────
// TODO: nested if — eligibility → grade classification → supplementary ternary
} else {
// Failure to meet conditions
$output_message = "<strong>DISQUALIFIED — Exam conditions not met</strong><br>";
$output_message .= "Reason: Attended $cats_attended CATs and Exam score was $exam.";
}


// ── 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


// ── 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
// 5. Final Output (SESE Principle)
echo "<h2>Student Result Card</h2>";
echo $output_message;
?>
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