first commit done

Calculator.java

@@ -0,0 +1,50 @@
+import java.util.Scanner;
+public class Calculator
+{	public static void main(String args[])
+	{
+
+
+	float a,b,res;
+	char choice,ch;
+	Scanner scan=new Scanner(System.in);
+
+	do{	System.out.println("1.Perform Subtraction");
+		System.out.println("2.Perform Addition");
+		System.out.println("3.Perform Multiplication");
+		System.out.println("4.Exit");
+		System.out.println("Enter your choice: ");
+		choice=scan.next().charAt(0);
+		switch(choice)
+		{	case '1': System.out.println("Enter two numbers: ");
+					a=scan.nextFloat();
+					b=scan.nextFloat();
+					Subtract s =new Subtract(a,b);
+					s.getRes();
+					break;
+
+
+			case '2': System.out.println("Enter two numbers: ");
+					a=scan.nextFloat();
+					b=scan.nextFloat();
+					res=a+b;
+					System.out.println("The result of addition is:" +res);
+					break;
+
+			case '3': System.out.println("Enter two numbers: ");
+					a=scan.nextFloat();
+					b=scan.nextFloat();
+					Multiply m =new Multiply(a,b);
+					m.getResult();
+					break;
+
+			case '4':System.out.println("Exiting!!!");
+					System.exit(0);
+					break;
+
+			default:System.out.println("Entered wrong choice!!!");
+					break;
+		}
+	}while(choice!='4');
+	}
+
+}

Multiply.java

@@ -0,0 +1,14 @@
+public class Multiply
+{
+	float a,b,res;
+	Multiply(float x,float y)
+	{
+		a=x;
+		b=y;
+	}
+	public void getResult()
+	{
+		res=a*b;
+		System.out.println("The result of multiplication is: "+res);
+	}
+}

README.md

@@ -3,3 +3,4 @@
 Sign your name in the list below
 
 - [Rajula Vineet Reddy](http://github.com/rajula96reddy/) - IMT2014045
+- [Samridhi Kundaliya ](https://github.com/sam1096) -MT2018101

Subtract.java

@@ -0,0 +1,14 @@
+public class Subtract
+{
+	float a,b,res;
+	Subtract(float x,float y)
+	{
+		a=x;
+		b=y;
+	}
+	public void getRes()
+	{
+		res=a-b;
+		System.out.println("The result of multiplication is: "+res);
+	}
+}