в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:18:53Z

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==Use an explicit conversion.==

<source lang="csharp">using System;

class TwoDimension {
int x, y;

public TwoDimension() {
x = y = 0;
}
public TwoDimension(int i, int j) {
x = i;
y = j;
}

// Overload binary +.
public static TwoDimension operator +(TwoDimension op1, TwoDimension op2)
{
TwoDimension result = new TwoDimension();

result.x = op1.x + op2.x;
result.y = op1.y + op2.y;

return result;
}

// This is now explicit.
public static explicit operator int(TwoDimension op1)
{
return op1.x * op1.y;
}

// Show X, Y
public void show()
{
Console.WriteLine(x + ", " + y);
}
}

class MainClass {
public static void Main() {
TwoDimension a = new TwoDimension(1, 2);
TwoDimension b = new TwoDimension(10, 10);
TwoDimension c = new TwoDimension();
int i;

Console.Write("Here is a: ");
a.show();
Console.WriteLine();
Console.Write("Here is b: ");
b.show();
Console.WriteLine();

c = a + b; // add a and b together
Console.Write("Result of a + b: ");
c.show();
Console.WriteLine();

i = (int) a; // explicitly convert to int -- cast required
Console.WriteLine("Result of i = a: " + i);
Console.WriteLine();

i = (int)a * 2 - (int)b; // casts required
Console.WriteLine("result of a * 2 - b: " + i);

}
}</source>
<pre class=codeResult>Here is a: 1, 2
Here is b: 10, 10
Result of a + b: 11, 12
Result of i = a: 2
result of a * 2 - b: -96</pre>

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в 15:31, 26 мая 2010

Admin: 1 версия