Add Calculator methods feature attempt1

src/main/java/com/houarizegai/calculator/Calculator.java

@@ -0,0 +1,18 @@
+public class Calculator{
+    public int add(int a,int b){
+        return a+b;
+    }
+    public int subtract(int a,int b){
+        return a-b;
+    }
+    public int multiply(int a,int b){
+        return a*b;
+    }
+    public double divide(int a,int b){
+        if(b==0){
+            throw new IllegalArgumentException("cannot divide by zero");
+        }
+        return (double)a/b;
+    }
+
+}

src/main/java/com/houarizegai/calculator/Student.java

@@ -0,0 +1,20 @@
+public class Student{
+    private String name;
+    private int id;
+
+    public Student(String name,int id){
+        this.name=name;
+        this.id=id;
+    }
+
+    public String getName(){return name;}
+    public void setName(){
+        this.name=name;
+    }
+    public int getId(){
+        return id;
+    }
+    public void setId(){
+        this.id=id;
+    }
+}