/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
class Main {
/*
// Iterative version
static int fibonacci(int n) {
if (n == 0) {
return 0;
}
int x = 1;
int y = 1;
for (int i = 3; i <= n; i++) {
int z = x + y;
x = y;
y = z;
}
return y;
}
*/
// Recursive version
static int fibonacci(int n) {
if ((n == 0) || (n == 1)) {
return n;
} else {
return fibonacci(n - 1) + (fibonacci(n - 2));
}
}
public static void main(String[] args) {
String arg = (args.length > 0) ? args[0] : "10";
try {
int x = Integer.parseInt(arg);
int y = fibonacci(x);
System.out.printf("fibonacci(%d)=%d\n", x, y);
y = fibonacci(x + 1);
System.out.printf("fibonacci(%d)=%d\n", x + 1, y);
} catch (NumberFormatException ex) {
System.err.println(ex);
System.exit(1);
}
}
}