Recently I’ve stumbled upon a few brain teasers on C# and it was fun trying to figure out the answers to the problems. So here are a few simple brain teasers from me.
Teaser 1
What will be displayed in the console?
void foo(int a, int b, int c)
{
Console.WriteLine(a);
Console.WriteLine(b);
Console.WriteLine(c);
}
.....
int i = 0;
foo(i++, i++, i++);
Teaser 2
Will that compile?
enum E { A, B, C, }
Teaser 3
How about that:
void foo(string s) {...}
void foo(StringBuilder sb) {...}
....
foo(null);
No answers provided. You want to know the answers, you have to try it yourself, no fun otherwise.
More teasers here and here. Got a brain teaser? Drop a comment.
public partial class MyClass { IEnumerable Power(int number, int exponent) { int counter = 0; int result = 1; while (counter++ < exponent) { result = result * number; Console.Write("x "); yield return result; } } } public partial class MyClass { public void foo() { foreach (int i in Power(2, 4)) { Console.Write("{0}", i); } } }what will foo() display?