diff --git a/代码/duishu.java b/代码/duishu.java
new file mode 100644
index 0000000..ac29411
--- /dev/null
+++ b/代码/duishu.java
@@ -0,0 +1,9 @@
+package open;
+
+public class duishu {
+
+	public double duishu(double a,double b) {
+		return Math.log(a)/Math.log(a);
+	}
+
+}
diff --git a/代码/main.java b/代码/main.java
new file mode 100644
index 0000000..7a476e8
--- /dev/null
+++ b/代码/main.java
@@ -0,0 +1,58 @@
+package open;
+import java.util.Scanner;
+public class main {
+
+	public main() {
+	
+	}
+
+	public static void main(String[] args) {
+		double a,c; String b;
+		Scanner sc = new Scanner(System.in);
+		a=sc.nextDouble();
+		b=sc.next();
+		if(b.equals("sin")) {
+			sanjiao d=new sanjiao();
+			System.out.println(d.sanjiao("sin", a));
+		}
+		else if(b.equals("cos")) {
+			sanjiao d=new sanjiao();
+			System.out.println(d.sanjiao("cos", a));
+		}
+		else if(b.equals("tan")) {
+			sanjiao d=new sanjiao();
+			System.out.println(d.sanjiao("tan", a));
+		}
+		else if(b.equals("^")) {
+			zhishu d=new zhishu();
+			System.out.println(d.zhishu(a));
+		}
+		else if(b.equals("log")) {
+			duishu d=new duishu();
+			c=sc.nextDouble();
+			System.out.println(d.duishu(a, c));
+		}
+		else if(b.equals("+")) {
+			sizeyunsuan d=new sizeyunsuan();
+			c=sc.nextDouble();
+			System.out.println(d.add(a, c));
+		}
+		else if(b.equals("-")) {
+			sizeyunsuan d=new sizeyunsuan();
+			c=sc.nextDouble();
+			System.out.println(d.subtract(a, c));
+		}
+		else if(b.equals("*")) {
+			sizeyunsuan d=new sizeyunsuan();
+			c=sc.nextDouble();
+			System.out.println(d.multiply(a, c));
+		}
+		else if(b.equals("/")) {
+			sizeyunsuan d=new sizeyunsuan();
+			c=sc.nextDouble();
+			System.out.println(d.divide(a, c));
+		}
+		else System.out.println("����");
+	}
+
+}
diff --git a/代码/sanjiao.java b/代码/sanjiao.java
new file mode 100644
index 0000000..dc8ce40
--- /dev/null
+++ b/代码/sanjiao.java
@@ -0,0 +1,16 @@
+package open;
+
+public class sanjiao {
+	
+public double sanjiao(String a,double b) {
+	double c=Math.toRadians(b);
+	if(a=="sin")
+		return Math.sin(c);
+	else if(a=="cos")
+		return Math.cos(c);
+	else if(a=="tan")
+		return Math.tan(c);
+	return 0;
+}
+
+}
diff --git a/代码/sizeyunsuan.java b/代码/sizeyunsuan.java
new file mode 100644
index 0000000..97f21c8
--- /dev/null
+++ b/代码/sizeyunsuan.java
@@ -0,0 +1,32 @@
+package open;
+
+public class sizeyunsuan {
+
+	public double add(double add1, double add2) {
+		//�ӷ�
+		double result;
+		result = add1 + add2;
+		return result;
+	}
+	
+	public double subtract(double sub1, double sub2) {
+		//����
+		double result;
+		result = sub1 - sub2;
+		return result;
+	}
+	
+	public double multiply(double mul1, double mul2) {
+		//�˷�
+		double result;
+		result = mul1 * mul2;
+		return result;
+	}
+	
+	public double divide(double div1, double div2) {
+		//����
+		double result;
+		result = div1 / div2;
+		return result;
+	}
+}
diff --git a/代码/zhishu.java b/代码/zhishu.java
new file mode 100644
index 0000000..9f6eab6
--- /dev/null
+++ b/代码/zhishu.java
@@ -0,0 +1,11 @@
+package open;
+
+public class zhishu {
+
+	public double zhishu(double a) {
+		return Math.pow(Math.E,a);
+		
+	}
+	
+
+}