<!DOCTYPE HTML> <html > <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>流程控制语句</title> <script type="text/javascript"> //第一步把之前的数据写成一个数组的形式,定义变量为 infos var infos = [ ['小A','女',21,'大一'], ['小B','男',23,'大三'], ['小C','男',24,'大四'], ['小D','女',21,'大一'], ['小E','女',22,'大四'], ['小F','男',21,'大一'], ['小G','女',22,'大二'], ['小H','女',20,'大三'], ['小I','女',20,'大一'], ['小J','男',20,'大三'] ]; //第一次筛选,找出都是大一的信息 var arr1 = []; var n = 0; for(var i=0;i<infos.length;i++){ if( infos[i][3] == "大一" ){ arr1[n] = infos[i]; document.write(arr1[n]+"<br/>"); n=n+1; } } document.write("大一人数: "+arr1.length+"<br/>"); //第二次筛选,找出都是女生的信息 for(var i=0;i<arr1.length;i++){ //这里可以用switch if(arr1[i][1]=='女') { document.write(arr1[i][0]+"<br/>");} } </script> </head> <body> </body> </html>
function Student(name,sex,age,grade){
this.name = neme;
this.sex = sex;
this.age = age;
this.grade = grade;
}
var s1 = new Student('小A','女',21,'大一');
var s1 = new Student('小B','男',23,'大三');
var s3 = new Student('小C','男',24,'大四');
var s4 = new Student('小D','女',21,'大一');
var infos = new Array();
infos.push(s1);
infos.push(s2);
infos.push(s3);
infos.push(s4);
var count = 0;
for(var i = 0;i < infos.length;i++){
if(infos[i].grade == "大一"){
document.writeln(infos[i]);
count ++;
}
}