first commit

d.java

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+package ¼Ó¼õ³Ë³ý;
+import java.util.*;
+public class d {
+	String s;
+	double x;
+	public d(String s,double x)
+	{
+		this.s=s;
+		this.x=x;
+	}
+	public double sanjiao()
+	{
+		if (s.equals("sin")) return sin(x);
+		else if (s.equals("cos")) return cos(x);
+		else if (s.equals("tan")) return tan(x);
+		else if (s.equals("asin")) return asin(x);
+		else if (s.equals("acos")) return acos(x);
+		else if (s.equals("atan")) return atan(x);
+		else return Double.POSITIVE_INFINITY;
+	}
+	private double sin(double x) {return Math.sin(x);}
+	private double cos(double x) {return Math.cos(x);}
+	private double tan(double x) {return Math.tan(x);}
+	private double asin(double x) {return Math.asin(x);}
+	private double acos(double x) {return Math.acos(x);}
+	private double atan(double x) {return Math.atan(x);}
+}