反转

/// <summary>
/// 数组全部反转
/// </summary>
/// <param name="array"></param>
public static void ArrayReverse(int[] array)
{
if (array == null)
{
throw new ArgumentNullException("array", "array不能为null");
}
//算法1：自定义方法

int[] newArray = new int[10];

for (int i = 0; i < array.Length; i++)
{
newArray[i] = array[array.Length - 1 - i];
}
foreach (var i in newArray)
{
Console.Write(i + " ");
}
Console.ReadLine();

//算法2：类库自带方法

Array.Reverse(array);

foreach (var i in array)
{
Console.Write(i + " ");
}
Console.ReadLine();

//算法3：运用栈后进先出特性

Stack stack = new Stack();

foreach (var i in array)
{
stack.Push(i);
}

for (int i = 0; i < array.Length; i++)
{
array[i] = Convert.ToInt32(stack.Pop());
}
foreach (var i in array)
{
Console.Write(i + " ");
}
Console.ReadLine();
}

/// <summary>
/// 数组局部反转
/// </summary>
public static void ArrayReverse(int[] array, int begin, int end)
{
if (array == null)
{
throw new ArgumentNullException("array", "array不能为null");
}
if (begin < 0)
{
throw new ArgumentOutOfRangeException("begin", "begin不能小于0");
}
if (end < begin)
{
throw new ArgumentOutOfRangeException("end不能小于begin", (Exception)null);
}
if (end > array.Length)
{
throw new ArgumentOutOfRangeException("end", "end超过array最大下标");
}

//算法1：自定义方法

while (end > begin)
{
int temp = array[begin];

array[begin] = array[end];

array[end] = temp;

begin++;

end--;
}

foreach (var i in array)
{
Console.Write(i + " ");
}
Console.ReadLine();

//算法2：类库自带方法

Array.Reverse(array, begin, end);

foreach (var i in array)
{
Console.Write(i + " ");
}
Console.ReadLine();
}

/// <summary>
/// 字符串全部反转
/// </summary>
public static void StringReverse()
{
string str = "0123456789";

string newStr = "";

for (int i = 0; i < str.Length; i++)
{
newStr += str.Substring(str.Length - 1 - i, 1);
}
Console.WriteLine(newStr);

Console.ReadLine();
}