C语言程序设计教程（第三版）课后习题8.7 （Java代码）

import java.util.Scanner;

public class Main {

        public static void Copy(String str){

                char[] array = str.toCharArray();

                char[] arr = new char[array.length];

                for(int i=0;i<array.length;i++){

                        if(array[i]=='a'||array[i]=='e'||array[i]=='i'||array[i]=='o'||array[i]=='u'){

                                for(int j=0;;j++){

                                        arr[j] = array[i];

                                        System.out.print(arr[j]);

                                        break;

                                }

                        }

                }

        }

        public static void main(String[] arg){

                Scanner sc = new Scanner(System.in);

                String str = sc.next();

                Copy(str);

        }

}