Interestingly similar code in Java produces the expected result "112"

public class PrecedenceTest {

    public PrecedenceTest(){
        int i = 1;
        printIt(i, i++, i);
    }

    protected void printIt(int i, int j, int k){
        System.out.println( i+"" + j+""+ k+"" );
    }

    public static void main(String[] args){
        PrecedenceTest p = new PrecedenceTest();
    }
}
[download]

Thanks to a colleague for writing this :-)