/**
 * This program is used to test whether your compiler can find out
 * some invalid operations about array.
 * The following program is wrong. Your compiler should find out the
 * errors. And it's better to point out the exact posiotions of the
 * errors and output useful information about the errors.
 */
 
class Program {
    static void main() {
        int[] a1 = {1,2,3,};    // ERROR: initialization expression should not end with ","
        int[3] a2 = {1,2,3};
        int[3] a3 = a2;         // ERROR: invalid assignment
        
        String s1 = "abc", s2=s1;   // CORRECT
        
        int l = a2.length;
        
        l = s1.length;          // ERROR
        
    }
    
    int[] f(int[] i) {  //ERROR: method can't return an array.
        return i;
    }
    
}