-2
我想學習編程，我寫了一個代碼添加到ArrayList的項目。有很多for循環，每個循環都運行一個特定的時間間隔，這給了我正確的結果。 但是，而不是很多for循環我試着只用一個循環與IF Else聲明，這doenots給我正確的結果 請任何人都可以檢查並告訴什麼是錯的？單循環給出了不同的結果比許多for循環
ArrayList dogs = new ArrayList();
ArrayList cats = new ArrayList();
ArrayList rabbits = new ArrayList();
ArrayList guineaPigs = new ArrayList();
ArrayList birds = new ArrayList();
ArrayList ferrets = new ArrayList();
//Before
for (int i = 0; i < 20; i++)
{
dogs.Add(new Animal(240.00, "D-PUP" + i));
}
for (int i = 0; i < 15; i++)
{
dogs.Add(new Animal(190.00, "D-JUN" + i));
}
for (int i = 0; i < 10; i++)
{
dogs.Add(new Animal(120.00, "D-ADU" + i));
}
for (int i = 0; i < 5; i++)
{
dogs.Add(new Animal(60.50, "D-SEN" + i));
}
//Before
for (int i = 0; i < 25; i++)
{
cats.Add(new Animal(220.00, "C-KIT" + i));
}
for (int i = 0; i < 30; i++)
{
cats.Add(new Animal(180.50, "C-JUN" + i));
}
for (int i = 0; i < 15; i++)
{
cats.Add(new Animal(120.00, "C-ADU" + i));
}
for (int i = 0; i < 10; i++)
{
cats.Add(new Animal(50, "C-SEN" + i));
}
//Before
for (int i = 0; i < 15; i++)
{
rabbits.Add(new Animal(120.75, "R-KIT" + i));
}
for (int i = 0; i < 15; i++)
{
rabbits.Add(new Animal(40.00, "R-ADU" + i));
}
//Before
for (int i = 0; i < 5; i++)
{
guineaPigs.Add(new Animal(15.00, "G-PUP" + i));
}
for (int i = 0; i < 10; i++)
{
guineaPigs.Add(new Animal(7.50, "G-ADU" + i));
}
//Before
for (int i = 0; i < 2; i++)
{
birds.Add(new Animal(90.00, "B-CHI" + i));
}
for (int i = 0; i < 5; i++)
{
birds.Add(new Animal(65.00, "B-ADU" + i));
}
//Before
for (int i = 0; i < 1; i++)
{
ferrets.Add(new Animal(150.00, "F-PUP" + i));
}
for (int i = 0; i < 3; i++)
{
ferrets.Add(new Animal(120.00, "F-ADU" + i));
}
for (int i = 0; i < 2; i++)
{
ferrets.Add(new Animal(30.50, "F-SEN" + i));
}
//After
int j = 30;
int i;
for(i = 0; i < j; i++)
{
if(i < 1)
{
ferrets.Add(new Animal(150.00, "F-PUP" + i));
}
if(i < 2)
{
birds.Add(new Animal(90.00, "B-CHI" + i));
ferrets.Add(new Animal(30.50, "F-SEN" + i));
}
if(i < 3)
{
ferrets.Add(new Animal(120.00, "F-ADU" + i));
}
if(i < 5)
{
dogs.Add(new Animal(60.50, "D-SEN" + i));
guineaPigs.Add(new Animal(15.00, "G-PUP" + i));
birds.Add(new Animal(65.00, "B-ADU" + i));
}
if(i < 10)
{
dogs.Add(new Animal(120.00, "D-ADU" + i));
cats.Add(new Animal(50, "C-SEN" + i));
guineaPigs.Add(new Animal(7.50, "G-ADU" + i));
}
if(i < 15)
{
dogs.Add(new Animal(190.00, "D-JUN" + i));
cats.Add(new Animal(120.00, "C-ADU" + i));
rabbits.Add(new Animal(120.75, "R-KIT" + i));
rabbits.Add(new Animal(40.00, "R-ADU" + i));
}
if(i < 20)
{
dogs.Add(new Animal(240.00, "D-PUP" + i));
}
if(i < 25)
{
cats.Add(new Animal(220.00, "C-KIT" + i));
}
if(i < 30)
{
cats.Add(new Animal(180.50, "C-JUN" + i));
}
}
沒有沒有工作！ – Alen
...順便說一句。在2017年與'ArrayList'一起工作...是不理想的。您可能需要閱讀[泛型]（https://msdn.microsoft.com/library/ms379564.aspx），然後使用'List'來代替。 –
Corak
當你說第二種方法產生「不正確」的結果時，你的意思是結果有錯誤的項目數量，或者你的意思是結果有正確數量的項目，但「在錯誤的地方」？ – Corak