一、Java
題目：101-200之間有多少個素數，並輸出所有素數。
class Test1{
public static void main(String[] args){
for(int i =101; i<=200; i++){
boolean falg = true;
for(int j=2;j<i;j++){
if(i%j==0){
falg = false;
break;
}
}
if(falg){
System.out.println(i);
}
}
}
}
CREATE TABLE student(
id INT(10) NOT NULL UNIQUE primary KEY,
name VARCHAR(20) not null,
sex VARCHAR(4),
birth YEAR,
depatment VARCHAR(20),
address VARCHAR(50)
);
CREATE TABLE score (
id INT(10) NOT NULL UNIQUE PRIMARY KEY AUTO_INCREMENT ,
stu_id INT(10) NOT NULL ,
c_name VARCHAR(20) ,
grade INT(10)
);
INSERT INTO student VALUES( 901,'張老大', '男',1985,'計算機系', '北京市海淀區');
INSERT INTO student VALUES( 902,'張老二', '男',1986,'中文系', '北京市昌平區');
INSERT INTO student VALUES( 903,'張三', '女',1990,'中文系', '湖南省永州市');
INSERT INTO student VALUES( 904,'李四', '男',1990,'英語系', '遼寧省阜新市');
INSERT INTO student VALUES( 905,'王五', '女',1991,'英語系', '福建省廈門市');
INSERT INTO student VALUES( 906,'王六', '男',1988,'計算機系', '湖南省衡陽市');
INSERT INTO score VALUES(NULL,901, '計算機',98);
INSERT INTO score VALUES(NULL,901, '英語', 80);
INSERT INTO score VALUES(NULL,902, '計算機',65);
INSERT INTO score VALUES(NULL,902, '中文',88);
INSERT INTO score VALUES(NULL,903, '中文',95);
INSERT INTO score VALUES(NULL,904, '計算機',70);
INSERT INTO score VALUES(NULL,904, '英語',92);
INSERT INTO score VALUES(NULL,905, '英語',94);
INSERT INTO score VALUES(NULL,906, '計算機',90);
INSERT INTO score VALUES(NULL,906, '英語',85);
SELECT * FROM student;
SELECT * FROM student LIMIT 1,3;
SELECT id, name, department FROM student;
SELECT * FROM student WHERE department IN ('計算機系','英語系');
select* from student where 2017-birth between 10 AND 22;
select depatment ,COUNT(id) from student group by depatment;
SELECT GROUP_CONCAT(c_name), MAX(grade) FROM score GROUP BY c_name;
SELECT c_name, grade FROM score WHERE stu_id= (SELECT id FROM student WHERE name= '李四' );
SELECT student.id, name, sex, birth, department, address, c_name, grade FROM student, score WHERE student.id=score.stu_id;
SELECT stu_id, SUM(grade) FROM score GROUP BY stu_id;
SELECT c_name, AVG(grade) FROM score GROUP BY c_name;
SELECT * FROM student WHERE id IN ( SELECT stu_id FROM score WHERE c_name= "計算機" AND grade<95);
SELECT * FROM student WHERE id =ANY ( SELECT stu_id FROM score WHERE stu_id IN ( SELECT stu_id FROM score WHERE c_name= '計算機') AND c_name= '英語' );
SELECT stu_id, grade FROM score WHERE c_name= '計算機' ORDER BY grade DESC;
SELECT id FROM student UNION SELECT stu_id FROM score;
SELECT student.id, name,sex,birth,depatment, address, c_name,grade
FROM student
LEFT JOIN score
on student.id=score.stu_id
where name LIKE '張%' OR name LIKE '王%'
SELECT name,birth,depatment, c_name,grade
FROM student
LEFT JOIN score
on student.id=score.stu_id
WHERE address LIKE '湖南%'
頁面上輸入一個年份（需驗證），判斷是否是閏年（能被4整除卻不能被100整除的年份;能被400整除的是閏年），需在頁面上顯示提示信息。
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus®">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<title>Document</title>
</head>
<body>
<input type ="text" id = "dd"/>
<button onclick="show()">驗證</button>
</body>
<script>
function show(){
var year ;
year = document.getElementById("dd").value;
if(year % 100 == 0){
//整百年數除以400
if(year % 400 == 0){
alert("是閏年");
}else{
alert("不是閏年");
}
}else{
//非整百年數除以4
if(year % 4 == 0){
alert("是閏年");
}else{
alert("不是閏年");
}
}
}
</script>
</html>
