Language: Java

import java.util.Scanner;

public class Main3 {
	public static void main(String[] args){

		//????????£?????????????????§????????????????????????
				Scanner sc = new Scanner(System.in);

				//int??????????????????
			     int a = sc.nextInt();
			     //int????????????????¨?
			     int b = sc.nextInt();
			     //??¢????????¨?????????
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
	}
}

Compiler output:
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                            ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                             ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                              ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                               ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                 ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                  ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                   ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                    ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                     ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                      ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                       ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                        ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                         ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                          ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                           ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                            ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                             ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                              ^
Main.java:14: error: illegal start of expression
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                               ^
Main.java:14: error: : expected
			     System.out.println(a*b?????????????????????2 * a + 2 * b);
			                                                             ^
21 errors