12306铁路售票系统.zip

package Circulation; import java.util.Scanner; public class zuoye { public static void main(String[] args) { Scanner input = new Scanner(System.in); String answer; do{ System.out.println("请输入0到2之间的整数："); int num = input.nextInt(); if(num<0||num>2){System.out.println("请输入正确的数字！"); return;} if(num==0){System.out.println("你出的是石头");} if(num==1){System.out.println("你出的是剪刀");} if(num==2){System.out.println("你出的是布");} System.out.println("是否要继续出拳？(n/y)"); answer = input.next(); } while(answer.equals("y")); System.out.println("结束！"); System.out.println("----------------------------------------------------------------------------------------"); int i1 =1; int sum =0; for(i1 = 1;i1<=100&&i1>=1;i1+=2){ sum = i1+sum; } System.out.println("基数和为："+sum); int num =2; int sum2 =0; while(num<=100&&num>=2){ sum2 = sum2+num; num+=2; } System.out.println("偶数和为："+sum2); System.out.println("----------------------------------------------------------------------------------------------"); int j = 0; long result = 1; for ( j = 0; j <10; j++) { result *= (j + 1); System.out.println(result); } //hasNextInt():他能判断你下一个输入的数据类型，如果是指定类型就进入true。 if(input.hasNextInt()){ int number = input.nextInt(); System.out.println("你输入的是一个整数"); } else {System.out.println("你输入的不是一个整数");} } }