IWD2-01/INFO-1272 (JS 1)/Notes/Final/index.js

// for (var count = 0; count <= 5; count++) {
//     console.log("This is count: " + count);
// }

// for (var count = 0; count < 7; count += 2) {
//     console.log("This is count: " + count);
// }

// for (var count = 10; count >= 0; count--) {
//     console.log("This is count: " + count);
// }

// console.log(Math.round(4.6666666));
// console.log(Math.ceil(4.6666666));
// console.log(Math.min(0, 100));

// function sumArray(arr) {
//     var sum = 0;
//     for (var i = 0; i < arr.length; i++) {
//         sum += arr[i];
//     }
//     return sum;
// }

// function reverseString(inString) {
//     var outString = "";
//     for (var i = inString.length - 1; i >= 0; i--) {
//         outString += inString[i];
//     }
//     return outString;
// }

// function printMessage() {
//     var userInput = document.getElementById("textInput").value;
//     console.log("You entered: ", userInput);
// }

// function currentTime() {
//     var now = new Date();
//     console.log(now.toLocaleDateString());
// }

// function randomArray(arr) {
//     var numElements = 10;
//     for (var i = 0; i < numElements; i++) {
//         arr.push(Math.floor(Math.random() * 100) + 1);
//     }
//     return arr;
// }

// var testArr = [1,2,3,4,5];
// var total = sumArray(testArr);
// console.log(total);

// console.log(reverseString("Penis"));

// // printMessage();
// currentTime();
// console.log(randomArray(testArr));

// var testDate = new Date();
// console.log(testDate.getDate()); // DAY OF MONTH
// console.log(testDate.getDay()); // DAY OF WEEK
// console.log(testDate.getFullYear());
// console.log(testDate.getMonth()); // STARTS AT 0
// console.log(testDate.getTime());
// console.log(testDate.getHours());

// function dateSlashes() {
//     var date = new Date();
//     var day = date.getDate();
//     var month = date.getMonth() + 1;
//     var year = date.getFullYear()
//     console.log(month + "/" + day + "/" + year);
// }

// function dateSlashesReverse() {
//     var date = new Date();
//     var day = date.getDate();
//     var month = date.getMonth() + 1;
//     var year = date.getFullYear()
//     console.log(year + "/" + month + "/" + day);
// }

// function monthWords () {
//     var date = new Date();
//     var day = date.getDate();
//     var monthNames = [
//         "January", "February", "March", "April", "May", "June",
//         "July", "August", "September", "October", "November", "December"
//     ]
//     var month = monthNames[date.getMonth()];
//     var year = date.getFullYear();
//     console.log(month + " " + day + ", " + year);
// }

// function monthWordsLong () {
//     var date = new Date();
//     var dayNames = [
//         "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"
//     ]
//     var weekDay = dayNames[date.getDay()];
//     var day = date.getDate();
//     var monthNames = [
//         "January", "February", "March", "April", "May", "June",
//         "July", "August", "September", "October", "November", "December"
//     ]
//     var month = monthNames[date.getMonth()];
//     var year = date.getFullYear();
//     console.log(weekDay + ", " + month + " " + day + ", " + year);
// }

// function printTime() {
//     var date = new Date();
//     var hour = date.getHours();
//     var minutes = date.getMinutes();
//     if (minutes < 10) {
//         minutes = "0" + date.getMinutes();
//     }
//     console.log(hour + ":" + minutes);
// }

// function printTime12Hr() {
//     var date = new Date();
//     var hour = date.getHours();
//     var minutes = date.getMinutes();
//     if (minutes < 10) {
//         minutes = "0" + minutes;
//     }
//     var half = hour < 12 ? "AM" : "PM";

//     hour = hour % 12;
//     if (hour === 0) {
//         hour = 12;
//     }

//     console.log(hour + ":" + minutes + " " + half);
// }

// dateSlashes();
// dateSlashesReverse();
// monthWords();
// monthWordsLong();
// printTime();
// printTime12Hr();

// switch(expression) {
//     case x: // can be anything really
//         //thing to do
//         break;
//     case y:
//         //different thing to do
//         break;
//     default:
//         //default behaviour
//         break; // without break, the program will execute the following cases
// }

// person = {
//     name: "Undefined",
//     age: 0
// };

// function Person(name, age) {
//     this.name = name;
//     this.age = age;
// }

// console.log(person);
// var people = [new Person("Levi", 20), new Person("Tyler", 20), new Person("Stu", 19), new Person("Andrew", 21)]
// console.log(people);

function Student(name) {
    this.name = name;
    this.score = 0;
}

function generateQuestions() {
    for (let i = 0; i < numQuestions; i++) {
        const q = generateRandomQuestion();
        console.log(q.question, q.answer);
        document.getElementById("question").textContent = q.question;
    }

};

function generateRandomQuestion() {
    const operators = ["+", "-", "*", "/"];
    const operator = operators[Math.floor(Math.random() * operators.length)];
    var num1 = Math.floor(Math.random() * 20) + 1;
    var num2 = Math.floor(Math.random() * 20) + 1;

    if (operator === "/") {
        num1 = num1 * num2;
    }

    const questionStr = `${num1} ${operator} ${num2}`;
    var answer;

    switch(operator) {
        case "+":
            answer = num1 + num2;
            break;
        case "-":
            answer = num1 - num2;
            break;
        case "*":
            answer = num1 * num2;
            break;
        case "/":
            answer = num1 / num2;
            break;
    }
    
    return { question: questionStr, answer: answer };
}

var currentStudent = null;
var numQuestions = 0;
var currentQuestion = 0;

document.getElementById("startBtn").addEventListener("click", function() {
    const nameInput = document.getElementById("studentName").value.trim();
    const numInput = parseInt(document.getElementById("numQuestions").value);

    if (nameInput === "" || isNaN(numInput) || numInput <= 0) {
        alert("Please enter a valid name and a number of questions above 0.");
        return;
    }

    currentStudent = new Student(nameInput);
    numQuestions = numInput;
    currentQuestion = 1;

    document.getElementById("quizArea").style.display = "block";
    document.getElementById("currentStudent").textContent = "Student: " + currentStudent.name;

    generateQuestions();
});