View Code of Problem 1

public class Calculate{
  public static void main(String args[]){
    int a = 1;
    int b = 2;
    int c = a+b;
    System.out.println(c);
  }
}

/*
Main.java:1: error: class Calculate is public, should be declared in a file named Calculate.java
public class Calculate{
       ^
1 error
*/