public class CUCSApplication {
    static void main(String[] args) {
        TokenReader in = new TokenReader(System.in);
        int a, b, c;
        System.out.print("please enter a: ");
        a = in.readInt();
        System.out.print("please enter b: ");
        b = in.readInt();
        System.out.print("please enter c: ");
        c = in.readInt();
        System.out.println("you typed in " + a + " " + b + " " + c);
        // remember to include $in.waitUntilEnter()$ here, at the end, to
        // prevent the output window from disappearing if you are using
        // codewarrior pro 3 (the labs use pro 5, so they don't need it)
    }
}

try the program above on the following inputs; below, if you provide
multiple inputs on one line, then TYPE THEM ALL ON THE SAME LINE
before pressing the Enter key.  make sure you understand what is
happening; you may need to try typing in other inputs to figure
it out.

-------------------------------------------------------------------------------
5
6
7
-------------------------------------------------------------------------------
blah
3
3.7
-2
8
-------------------------------------------------------------------------------
blah 3
3.7 -2
8
-------------------------------------------------------------------------------
3 -2 8
-------------------------------------------------------------------------------

now, change $int a,b,c;$ to $double a,b,c;$ but don't change
anything else.  try again the sample input sets above.  

observe that you get the same pattern of problems: $readInt$
requires an int, *even* *though* the variables are declared to
be $double$.

further observe that it is ok to assign an $int$ value to a
$double$ variable: java automatically converts integers to
floating point numbers because that is *always* "safe",
i.e. never loses any accuracy.  

however, you may NOT assign a $double$ value to an $int$
variable without explicitly converting --we'll show you how
later-- the $double$ value into an $int$: not every floating
point number can be converted without loss of accuracy into an
integer.

-------------------------------------------------------------------------------

now, change all the $readInt$s to $readDouble$s.  try again the
sample input sets above.

observe that $2$ is ok as an input for $readDouble$.