Java语言程序设计基础篇_第十版_梁勇_第四章17题答案！

liang183

一个月中的日期

package nameyu;

import java.util.Scanner;public class Test {

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        Scanner input=new Scanner(System.in);

        System.out.print("Enter a year:");

        int year=input.nextInt();

        Scanner iput=new Scanner(System.in);

        System.out.print("Enter a month:");

        String month=iput.nextLine();

        char ch1=month.charAt(0);

        char ch2=month.charAt(1);

        char ch3=month.charAt(2);

        if(ch1=='J'&&ch2=='a'&&ch3=='n'){

            System.out.println("Jan "+year+" has 31 days");

        }

        else if(ch1=='F'&&ch2=='e'&&ch3=='b'){

            if((year%4==0&&year%100!=0)||(year%400==0)){

                System.out.println("Feb "+year+" has 29 days");

            }else

                System.out.println("Feb "+year+" has 28 days");

        }

        else if(ch1=='M'&&ch2=='a'&&ch3=='r'){

            System.out.println("Mar "+year+" has 31 days");

        }

        else if(ch1=='A'&&ch2=='p'&&ch3=='r'){

            System.out.println("Apr "+year+" has 30 days");

        }

        else if(ch1=='M'&&ch2=='a'&&ch3=='y'){

            System.out.println("May "+year+" has 31 days");

        }

        else if(ch1=='J'&&ch2=='u'&&ch3=='n'){

            System.out.println("Jun "+year+" has 30 days");

        }

        else if(ch1=='J'&&ch2=='u'&&ch3=='l'){

            System.out.println("Jul "+year+" has 31 days");

        }

        else if(ch1=='A'&&ch2=='u'&&ch3=='g'){

            System.out.println("Aug "+year+" has 31 days");

        }

        else if(ch1=='S'&&ch2=='e'&&ch3=='p'){

            System.out.println("Sep "+year+" has 30 days");

        }

        else if(ch1=='O'&&ch2=='c'&&ch3=='t'){

            System.out.println("Oct "+year+" has 31 days");

        }

        else if(ch1=='N'&&ch2=='o'&&ch3=='v'){

            System.out.println("Nov "+year+" has 30 days");

        }

        else if(ch1=='D'&&ch2=='e'&&ch3=='c'){

            System.out.println("Dec "+year+" has 31 days");

        }

    }

    }