上机.1
package diliuzhang_dome;
import java.util.Scanner;
public class Diliuzhangshangji_01 {
public static void main(String[] args) {
int qwe = 0; //记录年龄30岁(含)以下顾客的人数
int asd = 0; //保存顾客的年龄
Scanner input = new Scanner(System.in);
for (int i = 0; i < 10; i++) {
System.out.println("请输入第"+(i+1)+"位顾客的年龄");
asd = input.nextInt();
if (asd >0 && asd <=30) {
qwe++;
}
}
System.out.println("30岁以下的比例是:"+qwe/10.0*100+"%");
System.out.println("30岁以上的比例是:"+(1-qwe/10.0)*100+"%");
}
}
上机.2
package diliuzhang_dome;
import java.util.Scanner;
public class Diliuzhangshangji_02 {
public static void main(String[] args) {
System.out.println("MyShopping 管理系统 > 客户信息管理 > 添加客户信息\n");
int qwe = 0;
String zxc;
int asd = 0;
Scanner input = new Scanner(System.in);
for (int i = 0; i < 3; i++) {
System.out.println("请输入会员号(<4位整数):");
qwe = input.nextInt();
System.out.println("请输入会员生日(月/日/<用两位整数表示>):");
zxc = input.next();
System.out.println("请输入会员积分:");
asd = input.nextInt();
if(qwe< 1000 || qwe >9999){
System.out.println("客户号"+ qwe+"是无效会员号!");
System.out.println("录入信息失败\n");
continue;
}
System.out.println("您录入的会员信息是:");
System.out.println(qwe+""+zxc+""+asd+"\n");
}
System.out.println("程序结束!");
}
}
上机.3
package diliuzhang_dome;
import java.util.Scanner;
public class Diliuzhangshangji_03 {
public static void main(String[] args) {
int i =0;
String qwe;
String asd;
Scanner input = new Scanner(System.in);
for ( i = 0; i < 3; i++) {
System.out.print("请输入用户名:");
qwe = input.next();
System.out.print("请输入密码:");
asd = input.next();
if("jim".equals(qwe) && "123456".equals(asd)){ //匹配
System.out.println("欢迎登陆Myshopping系统!");
break;
}else{
System.out.println("输入错误!您还有"+(2-i)+"次机会"); //不匹配
continue;
}
}
if(i ==3){ //三次都不匹配
System.out.println("对不起,您3次均输入错误!");
}
}
}