每日一练126——Java我在2099年多大呢？(8kyu)

题目

菲利普刚刚四岁，他想知道未来几年他将会有多大年纪，如2090年或3044年。他的父母无法跟上计算，所以他们恳求你通过编写一个程序来帮助他们。可以回答菲利普无休止的问题。

你的任务是编写一个带有两个参数的函数：出生年份和相对于年份的年份。由于菲利普每天都变得更加好奇，他可能很快就会想知道他出生多少年，所以你的职能需要在未来和过去的两个日期工作。

以这种格式提供输出：对于未来的日期：“你是......年龄。” 对于过去的日期：“你将出生在...年。” 如果出生年份等于要求回报的年份：“你这一年就出生了！”

“......”将由​​数字代替，然后由单个空格继续。请注意，您需要考虑“年”和“年”，具体取决于结果。

祝好运！

测试用例：

import org.junit.Test;
import static org.junit.Assert.assertEquals;
import org.junit.runners.JUnit4;

public class SolutionTest {

AgeDiff age = new AgeDiff();

public static int born;
public static int year;
private static int pom;

    @Test
    public void testAge() {
    
        assertEquals("You are 4 years old.", age.CalculateAge(2012, 2016));
        assertEquals("You are 27 years old.", age.CalculateAge(1989, 2016));
        assertEquals("You are 90 years old.", age.CalculateAge(2000, 2090));
        assertEquals("You will be born in 10 years.", age.CalculateAge(2000, 1990));
        assertEquals("You were born this very year!", age.CalculateAge(3400, 3400));
        assertEquals("You are 2000 years old.", age.CalculateAge(900, 2900));
        assertEquals("You will be born in 110 years.", age.CalculateAge(2010, 1900));
        assertEquals("You will be born in 510 years.", age.CalculateAge(2010, 1500));
        assertEquals("You are 1 year old.", age.CalculateAge(2011, 2012));
        assertEquals("You will be born in 1 year.", age.CalculateAge(2000, 1999));
     
    }
    
    @Test
    public void testRandomAge() {
    
    for(int i = 1; i <= 100; i++){
           born = (int) (100+Math.random()*4000);
           year = (int) (100+Math.random()*4000);
           pom = year-born;
           
     if (pom == 0) assertEquals("You were born this very year!", age.CalculateAge(born, year)); 
    
     if (pom == 1) assertEquals("You are 1 year old.", age.CalculateAge(born, year));
      
     if (pom == -1) assertEquals("You will be born in 1 year.", age.CalculateAge(born, year));
    
     if(pom > 0) assertEquals("You are " + pom + " years old.", age.CalculateAge(born, year));
     else assertEquals("You will be born in " + (-pom) + " years.", age.CalculateAge(born, year));
    
           }
    }
}

解题

My

public class AgeDiff 
{
  public static String CalculateAge(int birth, int yearTo) 
  {
    if (birth < yearTo) {
      if (yearTo-birth == 1) {
        return "You are 1 year old.";
      } else {
        return String.format("You are %s years old.", yearTo-birth);
      }
    } else if (birth > yearTo) {
      if (birth-yearTo == 1) {
        return "You will be born in 1 year.";
      } else {
        return String.format("You will be born in %s years.", birth-yearTo);
      }
    } else if (birth == yearTo) {
      return "You were born this very year!";
    } else {
      return "Error!";
    }
  }
}

Other

public class AgeDiff {

  public static String CalculateAge(int birth, int year) {
    final int age = year - birth;    
    return 
      age == 0 ? "You were born this very year!" :
      age > 0 ? String.format("You are %d year%s old.", age, age == 1 ? "" : "s") :
      String.format("You will be born in %d year%s.", -age, -age == 1 ? "" : "s");
  }
}

class AgeDiff 
{
  public static String CalculateAge(int birth, int yearTo) 
  {
  int a = yearTo - birth;
  
    if (a == 0) return "You were born this very year!";
    
    if (a == 1) return "You are 1 year old.";
      
    if (a == -1) return "You will be born in 1 year.";
    
    return a > 0 ? "You are " + a + " years old." : "You will be born in " + (-a) + " years.";
    
    }
}

public class AgeDiff 
{
  public static String CalculateAge(int birth, int yearTo) 
  {
  int age = Math.abs(yearTo - birth);
  String year = " years";
  if (Math.abs(yearTo - birth) == 1) {year = " year";}
  if (yearTo < birth) {return "You will be born in " + age + year + ".";}
  if (birth < yearTo) {return "You are " + age + year + " old.";}
  return "You were born this very year!";
  }
}

后记

我这丑代码还是可以改改的。