20180625

JavaScript编写九九乘法表

<!DOCTYPE html>
<html>
	<head>
		<meta charset="{CHARSET}">
		<title>九九乘法表</title>
	</head>
	<body>
		<div id="cf"></div>
		<script type="text/javascript">
			var str = "";
			for (var i = 1; i <= 9; i++) {
				for (var j = 1; j <= i ; j++) {
					str += i + "*"  + j + "=" + (i * j) + "";
					if(i == j){
						str += "<br>";
					}
				};
				document.getElementById("cf").innerHTML =str;
			};
		</script>
	</body>
</html>

MySQL

CREATE TABLE User(
	Name VARCHAR(20),
	Tel  INT(20),
	Content VARCHAR(20),
	Date   DATE
);
INSERT INTO user VALUES('张三','13333663366','大专毕业','2006-10-11');
INSERT INTO user VALUES('张四','13612312331','本科毕业','2006-10-15');
INSERT INTO user VALUES('小明','13905333221','中专毕业','2006-10-15');


INSERT INTO user VALUES('小王','13254748547','高中毕业','2007-05-06');
UPDATE User SET Date=NOW() WHERE Name='张三';
DELETE FROM User WHERE Name='张四';

Java 编程题

有 1、2、3、4 个数字，能组成多少个互不相同且无重复数字的三位数？都是多少？

package test;

public class Test {
	public static void main(String[] args) {
		String str = "";
		for (int i = 1; i <= 4; i++ ){
			for(int j = 1; j <= 4;j++){
				if (i == j){
					continue;
				}
				for(int k = 1; k <= 4; k++){
					if(j == k || k == i){
						continue;
					}
					str += (i * 100 + j * 10 + k + " ");
				}
			}
		}
		System.out.println(str.substring(0,str.length() - 1));
	}
}