C# goto

示例 1：goto 在 switch 语句中的使用

class SwitchTest
{
static void Main()
{
Console.WriteLine("Coffee sizes: 1=Small 2=Medium 3=Large");
Console.Write("Please enter your selection: ");
string s = Console.ReadLine();
int n = int.Parse(s);
int cost = 0;
switch (n)
{
case 1:
cost += 25;
break;
case 2:
cost += 25;
goto case 1;
case 3:
cost += 50;
goto case 1;
default:
Console.WriteLine("Invalid selection.");
break;
}
if (cost != 0)
{
Console.WriteLine($"Please insert {cost} cents.");
}
Console.WriteLine("Thank you for your business.");
// Keep the console open in debug mode.
Console.WriteLine("Press any key to exit.");
Console.ReadKey();
}
}

示例 2：使用 goto 跳出嵌套循环

public class GotoTest1
{
static void Main()
{
int x = 200, y = 4;
int count = 0;
string[,] array = new string[x, y];
// Initialize the array.
for (int i = 0; i < x; i++)
for (int j = 0; j < y; j++)
array[i, j] = (++count).ToString();
// Read input.
Console.Write("Enter the number to search for: ");
// Input a string.
string myNumber = Console.ReadLine();
// Search.
for (int i = 0; i < x; i++)
{
for (int j = 0; j < y; j++)
{
if (array[i, j].Equals(myNumber))
{
goto Found;
}
}
}
Console.WriteLine($"The number {myNumber} was not found.");
goto Finish;
Found:
Console.WriteLine($"The number {myNumber} is found.");
Finish:
Console.WriteLine("End of search.");
// Keep the console open in debug mode.
Console.WriteLine("Press any key to exit.");
Console.ReadKey();
}
}