求平方
Math.Sqrt(),就是用来求平方根的。
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static void Main(string[] args)
{
double a = 4, b = 9, c = 25, d = 54;
Console.WriteLine(Math.Sqrt(a));
Console.WriteLine(Math.Sqrt(b));
Console.WriteLine(Math.Sqrt(c));
Console.WriteLine((int)Math.Sqrt(d));
}
