alert("Welcome to Square and Cube Quiz! \nHere you can practise your skills of square, cube, square root and cube root \nI made this app specially for my dear sister who is preparing for competitive exams. \nI hope every aspiring candidate likes this code and practise his skill"); alert("Rules \nFirst select the range of numbers, goal time and the operation you want to perform \nWhen the time ends or when you give an incorrect answer the quiz will finish. \nThere will be only 10 Questions per quiz.\n\nBest of luck!"); //constructor function for every question function Question(text, choices, answer) { this.text = text; this.choices = choices; this.answer = answer; } Question.prototype.isCorrectAnswer = function(choice) { return this.answer === choice; } function Quiz(questions) { this.score = 0; this.questions = questions; this.questionIndex = 0; } Quiz.prototype.getQuestionIndex = function() { return this.questions[this.questionIndex]; } Quiz.prototype.guess = function(answer) { if(this.getQuestionIndex().isCorrectAnswer(answer)) { this.score++; } else { endtime = performance.now(); timetook = endtime - starttime; timetook = Math.floor(timetook / 1000); showScores(timetook); stoptimer = true; } this.questionIndex++; } Quiz.prototype.isEnded = function() { return this.questionIndex === this.questions.length; } //define all the variables var maximumnum; var minimumnum; var noofquestion = 10; var championtime; var goalminute; var goalsecond; var starttime; var endtime; var timetook; var questions; var quiz; var randomlist; var resultlist; var operation; var operationString; // √ ² ³ ∛ var rootOp; var stoptimer = false; function populate() { if(quiz.questionIndex == 0) { starttime = performance.now(); } if(quiz.isEnded()) { endtime = performance.now(); timetook = endtime - starttime; timetook = Math.floor(timetook / 1000); showScores(timetook); stoptimer = true; } if(stoptimer == false) { // show question var element = document.getElementById("question"); element.innerHTML = quiz.getQuestionIndex().text; // show options var choices = quiz.getQuestionIndex().choices; for(var i = 0; i < choices.length; i++) { var element = document.getElementById("choice" + i); element.innerHTML = choices[i]; guess("btn" + i, choices[i]); } showProgress(); } }; function guess(id, guess) { var button = document.getElementById(id); button.onclick = function() { quiz.guess(guess); populate(); } }; function showProgress() { var currentQuestionNumber = quiz.questionIndex + 1; var element = document.getElementById("progress"); element.innerHTML = "Question " + currentQuestionNumber + " of " + quiz.questions.length; }; function showScores(timetook) { var scorepercent = Math.floor((quiz.score / 10) * 100); var timepercent = Math.floor((championtime / timetook) * 100); if(timepercent > 100) { timepercent = 100; }; var grosspercent = Math.floor((scorepercent + timepercent) / 2); var gameOverHTML = "

Result

"; gameOverHTML += "

Your score: " + quiz.score + "/10

"; gameOverHTML += "

Range: (" + minimumnum + " - " + maximumnum + ")

"; gameOverHTML += "

Time took: " + timetook + " secs" + "

"; gameOverHTML += "

Your Goal: " + championtime + " secs" + "

"; gameOverHTML += "

Gross Score: " + grosspercent + " %" + "

"; gameOverHTML += "

" + complement(grosspercent) + "

"; gameOverHTML += "" var element = document.getElementById("quiz"); originalhtml = element.innerHTML; element.innerHTML = gameOverHTML; }; function complement(grosspercent) { if(grosspercent < 50) { return "You seriously need more practise"; } else if(grosspercent >= 50 && grosspercent <= 80) { return "Good Job. Keep practising and reach your goal"; } else if(grosspercent > 80 && grosspercent <= 95) { return "You are very near to your goal keep going"; } else if(grosspercent > 95 && grosspercent < 100) { return "Even the sky is not the limit keep going"; } else if(grosspercent >= 100) { return "Congrats you finally reached your goal"; } } function randomgen(min, max) { return Math.floor(Math.random() * (max - min) + min); } function generateRandomnumbers() { randomlist = []; resultlist = []; for(var i = 0; i < noofquestion; i++) { randomlist.push(randomgen(minimumnum, maximumnum + 1)); } for(var i = 0; i < noofquestion; i++) { resultlist.push(Math.pow(randomlist[i], operation)); } } function generateQuestions() { questions = []; for(var i = 0; i < 10; i++) { if(rootOp) { str = operationString + randomlist[i]; var resultstr = resultlist[i].toFixed(2); var firstdigit = Number(resultstr[0]); var restdigit = resultstr.slice(1); ansarr = [ Number(String(firstdigit - 1) + restdigit), Number(String(firstdigit + 2) + restdigit), Number(String(firstdigit + 1) + restdigit), Number(resultlist[i]).toFixed(2) ]; corans = resultlist[i].toFixed(2); } else { str = randomlist[i] + operationString; ansarr = [ Math.pow(Number(randomlist[i]) - 1, operation), Math.pow(Number(randomlist[i]) + 1, operation), Math.pow(Number(randomlist[i]) - 2, operation), resultlist[i] ]; corans = resultlist[i]; } questions.push(new Question(str, ansarr, corans)); } } function shuffle(array) { var currentIndex = array.length, temporaryValue, randomIndex; // While there remain elements to shuffle... while(0 !== currentIndex) { // Pick a remaining element... randomIndex = Math.floor(Math.random() * currentIndex); currentIndex -= 1; // And swap it with the current element. temporaryValue = array[currentIndex]; array[currentIndex] = array[randomIndex]; array[randomIndex] = temporaryValue; } return array; } function restart(originalhtml, timetook) { var element = document.getElementById('quiz'); element.innerHTML = originalhtml; quiz.questionIndex = 0; quiz.score = 0; document.getElementById('timer').innerHTML = goalminute + ":" + goalsecond; stoptimer = false; generateRandomnumbers(); generateQuestions(); shuffle(questions); for(var i = 0; i < questions.length; i++) { shuffle(questions[i].choices); } quiz = new Quiz(questions); startTimer(); populate(); } function startTimer() { if(stoptimer == false) { var presentTime = document.getElementById('timer').innerHTML; var timeArray = presentTime.split(/[:]+/); var m = timeArray[0]; var s = checkSecond((timeArray[1] - 1)); //if(m<0){alert('timer completed')} document.getElementById('timer').innerHTML = m + ":" + s; setTimeout(startTimer, 1000); if(s == 59) { m = m - 1 } else if(m == 0 && s == 0) { endtime = performance.now(); timetook = endtime - starttime; timetook = Math.floor(timetook / 1000); showScores(timetook + 1); stoptimer = true; } } } function checkSecond(sec) { if(sec < 10 && sec >= 0) { sec = "0" + sec }; // add zero in front of numbers < 10 if(sec < 0) { sec = "59" }; return sec; } // display quiz // var starttime = performance.now(); window.onload = function() { var start = document.getElementById('start'); start.onclick = function() { document.getElementsByClassName('intro')[0].style.display = "none"; document.getElementsByClassName('grid')[0].style.display = "block"; maximumnum = Number(document.getElementById('maxnum').value); minimumnum = Number(document.getElementById('minnum').value); championtime = Number(document.getElementById('goaltime').value); goalminute = Math.floor(championtime / 60); goalsecond = Math.floor(championtime % 60); var sqbtn = document.getElementById('sq').checked; var cubtn = document.getElementById('cu').checked; var sqrtbtn = document.getElementById('sqrt').checked; var curtbtn = document.getElementById('curt').checked; if(sqbtn) { operation = 2; //√ ² ³ ∛ operationString = '²'; } else if(cubtn) { operation = 3; operationString = '³'; } else if(sqrtbtn) { operation = 1 / 2; operationString = '√'; rootOp = true; } else if(curtbtn) { operation = 1 / 3; operationString = '∛'; rootOp = true; } generateRandomnumbers(); generateQuestions(); shuffle(questions); for(var i = 0; i < questions.length; i++) { shuffle(questions[i].choices); } document.getElementById('timer').innerHTML = goalminute + ":" + goalsecond; startTimer(); // create quiz quiz = new Quiz(questions); populate(); } }

Square & Cube Quiz