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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{switch(operator)                              
     {
     case '+':
                     printf("num1+num2=%.2f",num1+num2);
                     getch();
                     break;
     case '-':
                    printf("num1-num2=%.2f",num1-num2);
                    getch();
 
     default:                                 
                    printf("Operator is not correct");
                    getch();
                    break;
     }
		// your code goes here
	}
}

Main.java:11: error: cannot find symbol
	{switch(operator)                              
	        ^
  symbol:   variable operator
  location: class Ideone
Main.java:11: error: illegal start of type
	{switch(operator)                              
	       ^
Main.java:14: error: cannot find symbol
                     printf("num1+num2=%.2f",num1+num2);
                                             ^
  symbol:   variable num1
  location: class Ideone
Main.java:14: error: cannot find symbol
                     printf("num1+num2=%.2f",num1+num2);
                                                  ^
  symbol:   variable num2
  location: class Ideone
Main.java:15: error: cannot find symbol
                     getch();
                     ^
  symbol:   method getch()
  location: class Ideone
Main.java:18: error: cannot find symbol
                    printf("num1-num2=%.2f",num1-num2);
                                            ^
  symbol:   variable num1
  location: class Ideone
Main.java:18: error: cannot find symbol
                    printf("num1-num2=%.2f",num1-num2);
                                                 ^
  symbol:   variable num2
  location: class Ideone
Main.java:19: error: cannot find symbol
                    getch();
                    ^
  symbol:   method getch()
  location: class Ideone
Main.java:22: error: cannot find symbol
                    printf("Operator is not correct");
                    ^
  symbol:   method printf(String)
  location: class Ideone
Main.java:23: error: cannot find symbol
                    getch();
                    ^
  symbol:   method getch()
  location: class Ideone
10 errors

Standard output is empty