我对javascript知之甚少，我正在进行javascript测验，其中我的问题显示在提示中。我需要我的测验来跟踪用户已正确回答的答案数量，并在游戏结束时输出这个答案以及正确答案的百分比。我看了我的问题，我添加了函数returnScore（）{ 警报（＆＃34;你的分数为＆＃34; + getScore（）+＆＃34; /＆＃34; + tot）; } 我的编码，它不起作用。
`<!DOCTYPE html>
<html>
<head>
<title>Supernatural Trvia Quiz</title>
<style type="text/css">
body{
background-image : url("http://wallpapercave.com/wp/tNqlnzg.jpg");
background-repeat : no-repeat;
background-size: 100% 100%;
position:absolute;
margin-left: 5%;
margin-top: 5%;
color:white;
font-size:20px;
font-family:Georgia;
font-weight: bold;
}
</style>
<script>
i = 1 // counter variable
var score=0
function main(){ // main part of program
if (i==1){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="What are the names of the main characters?\na) Sam and Bobby\nb) Sam and Dean\nc) Jess and Dean\nd) Sam and John ";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="b" // assigns the correct answer
ans=prompt(i+'.) What are the names of the main characters? \na) Sam and Bobby\nb) Sam and Dean\nc) Jess and Dean\nd) Sam and John') // gives user a chance to answer
}// end of question 1
else if (i==2){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="In the first episode when Sam got home, where did he find his girlfriend dead?\na) On the ceiling\nb) On the floor\nc) In bed\nd) In the kitchen ";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="a" // assigns the correct answer
ans=prompt(i+'.) In the first episode when Sam got home, where did he find his girlfriend dead?\na) On the ceiling\nb) On the floor\nc) In bed\nd) In the kitchen ') // gives user a chance to answer
}// end of question 2
else if (i==3){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="What is the name of Sam and Dean's father? \na) John Winchester \nb) Adam Winchester \nc) Castiel Novak \nd) Bobby Singer";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="a" // assigns the correct answer
ans=prompt(i+'.) What is the name of Sam and Dean s father? \na) John Winchester \nb) Adam Winchester \nc) Castiel Novak \nd) Bobby Singer ') // gives user a chance to answer
}// end of question 3
else if (i==4){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="What is Dean's favourite dessert? \na) Cake \nb) Eclair \nc) Ice cream \nd) Pie";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="d" // assigns the correct answer
ans=prompt(i+'.) What is Dean s favourite dessert? \na) Cake \nb) Eclair \nc) Ice cream \nd) Pie ') // gives user a chance to answer
}// end of question 4
else if (i==5){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="Who was Sam dating in the beginning of season 1? \na) Meg \nb) Madison \nc) Jessica \nd) Ruby";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="c" // assigns the correct answer
ans=prompt(i+'.) Who was Sam dating in the beginning of season 1? \na) Meg \nb) Madison \nc) Jessica \nd) Ruby ') // gives user a chance to answer
}// end of question 5
else if (i==6){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="In the pilot episode, who or what did the boys search for? \na) Windigo \nb) Bloody Mary \nc) Dracula \nd) The Woman in White";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="d" // assigns the correct answer
ans=prompt(i+'.) In the pilot episode, who or what did the boys search for? \na) Windigo \nb) Bloody Mary \nc) Dracula \nd) The Woman in White ') // gives user a chance to answer
}// end of question 6
else if (i==7){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="What is the license plate on the Impala during seasons 1 and 2? \na) KAZ-2Y5 \nb) K4Z-2Y8 \nc) KA2-ZY5 \nd) KA2-2Y9";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="a" // assigns the correct answer
ans=prompt(i+'.) What is the license plate on the Impala during seasons 1 and 2? \na) KAZ-2Y5 \nb) K4Z-2Y8 \nc) KA2-ZY5 \nd) KA2-2Y9 ') // gives user a chance to answer
}// end of question 7
else if (i==8){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="When is Dean's birthday? \na) July 24, 1979 \nb) June 20, 1980 \nc) January 16, 1980 \nd) January 24, 1979";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="d" // assigns the correct answer
ans=prompt(i+'.) When is Dean s birthday? \na) July 24, 1979 \nb) June 20, 1980 \nc) January 16, 1980 \nd) January 24, 1979 ') // gives user a chance to answer
}// end of question 8
else if (i==9){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="Who is the king of Hell? \na) Zachariah \nb) Crowley \nc) Castiel \nd) Raphael";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="b" // assigns the correct answer
ans=prompt(i+'.) Who is the king of Hell? \na) Zachariah \nb) Crowley \nc) Castiel \nd) Raphael ') // gives user a chance to answer
}// end of question 9
else if (i==10){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="What is the name of Sam and Dean's brother? \na) Adam \nb) Kevin \nc) Castiel \nd) Bobby";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="a" // assigns the correct answer
ans=prompt(i+'.) What is the name of Sam and Dean s brother? \na) Adam \nb) Kevin \nc) Castiel \nd) Bobby ') // gives user a chance to answer
}// end of question 10
else if (i==11){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="What is the name of the dogs? \na) Demon Dogs \nb) Hell Hounds \nc) Ghostfacers \nd) Dogs";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="b" // assigns the correct answer
ans=prompt(i+'.) What is the name of the dogs? \na) Demon Dogs \nb) Hell Hounds \nc) Ghostfacers \nd) Dogs ') // gives user a chance to answer
}// end of question 11
else if (i==12){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="Who Killed Sam & Dean's mother? \na) Crowley \nb) A demon \nc) Lucifer \nd) The yellowed eyed demon";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="d" // assigns the correct answer
ans=prompt(i+'.) Who Killed Sam & Dean s mother? \na) Crowley \nb) A demon \nc) Lucifer \nd) The yellowed eyed demon ') // gives user a chance to answer
}// end of question 12
else if (i==13){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="Who wants Sam's vessel? \na) Crowley \nb) Lucifer \nc) Raphael \nd) Zachariah";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="b" // assigns the correct answer
ans=prompt(i+'.) Who wants Sam s vessel? \na) Crowley \nb) Lucifer \nc) Raphael \nd) Zachariah ') // gives user a chance to answer
}// end of question 13
else if (i==14){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="Which actor plays Sam Winchester? \na) Jensen Ackles \nb) Mark Sheppard \nc) Jared Padalecki \nd) Osric Chau";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="c" // assigns the correct answer
ans=prompt(i+'.) Which actor plays Sam Winchester? \na) Jensen Ackles \nb) Mark Sheppard \nc) Jared Padalecki \nd) Osric Chau ') // gives user a chance to answer
}// end of question 14
else if (i==15){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="Which Winchester was the first to die? \na) Mary \nb) John \nc) Sam \nd) Dean";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="a" // assigns the correct answer
ans=prompt(i+'.) Which Winchester was the first to die? \na) Mary \nb) John \nc) Sam \nd) Dean ') // gives user a chance to answer
}// end of question 15
else if (i==16){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="What chemical compound is one of the few weaknesses of Leviathans? \na) Nitrate \nb) Borax \nc) Sulfur \nd) Ferrate";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="b" // assigns the correct answer
ans=prompt(i+'.) What chemical compound is one of the few weaknesses of Leviathans? \na) Nitrate \nb) Borax \nc) Sulfur \nd) Ferrate ') // gives user a chance to answer
}// end of question 16
else if (i==17){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="What chemical compound is one of the few weaknesses of Leviathans? \na) 1 \nb) 2 \nc) 3 \nd) 4";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="c" // assigns the correct answer
ans=prompt(i+'.) What chemical compound is one of the few weaknesses of Leviathans? \na) 1 \nb) 2 \nc) 3 \nd) 4 ') // gives user a chance to answer
}// end of question 17
else if (i==18){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="The boys have had numerous runins with a group of self-proclaimed paranormal experts who call themselves what? \na) Ghostblasters \nb) Ghostkillers \nc) Ghosthunters \nd) Ghostfacers";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="d" // assigns the correct answer
ans=prompt(i+'.) The boys have had numerous runins with a group of self-proclaimed paranormal experts who call themselves what? \na) Ghostblasters \nb) Ghostkillers \nc) Ghosthunters \nd) Ghostfacers ') // gives user a chance to answer
}// end of question 18
else if (i==19){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="After whom was Dean Winchester named? \na) His grandfather \nb) His grandmother \nc) His father \nd) No one";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="b" // assigns the correct answer
ans=prompt(i+'.) After whom was Dean Winchester named? \na) His grandfather \nb) His grandmother \nc) His father \nd) No one ') // gives user a chance to answer
}// end of question 19
else if (i==20){
document.view.qnum.value=i; // puts question # in text box
document.view.question.value ="Which actor plays the character Castiel Novak?\na) Misha Collins \nb) Jim Beaver \nc) Mark Pellegrino \nd) Mark Sheppard";
// above code puts the question in the textarea, note the use of \n for "new line"
correct="a" // assigns the correct answer
ans=prompt(i+'.) Which actor plays the character Castiel Novak?\na) Misha Collins \nb) Jim Beaver \nc) Mark Pellegrino \nd) Mark Sheppard ') // gives user a chance to answer
}// end of question 20
document.view.go.focus(); // puts the focus on the "Next Question >" button so the enter key will activate it
if (correct==ans){ // compares the real answer to the users answer
document.view.question.value =" You are right!" // puts comment in textarea
score ++;
}
else{
document.view.question.value =" You are wrong" // puts comment in textarea
}
i++; // keeps track of number of questions asked
function returnScore(){
alert("Your score is "+ getScore() +"/"+ tot);
}
} //end of main function
</script>
</head>
<body LINK="F7DD5E" VLINK="F7DD5E" ALINK="F7DD5E" onLoad="main()">
<FORM name="view">
Question: <input type="text" name="qnum" size="2"> <input type="button" name="go" value="Next Question >" onClick=main()>
<br><br>
<TEXTAREA COLS=36 ROWS=9 name="question" wrap="virtual"></TEXTAREA>
</FORM>
</body>
</html>
`
答案 0 :(得分：0)
你非常接近。增加i后，您需要检查它是否大于20，因为您总共有20个问题，然后显示分数。而不是：
function returnScore(){
alert("Your score is "+ getScore() +"/"+ tot);
}
把这个：
// i is not 1 to 20, so there are no more questions
if (i > 20){
alert("End of Game\nYour score is: "+ score + "/" + 20 + "\nYou scored: " + (score / 20) * 100 + "%" );
}