摘要： ch04 Programming Exercise1. 1 /** 2 * File: Ex4_1.java 3 * ---------------- 4 * This program is to generate the lyrics . 5 * 6 * @author Administrator 7 * 8 */ 9 import acm.program.*;10 11 public class Ex4_1 extends ConsoleProgram {12 13 public void run() {14 15 for (int i=n; i>0; i--){16 println 阅读全文