ISC practical papers › ISC 2016 › Question 3

Words beginning/ending with vowels

ISC 2016 Computer Science Practical, Question 3 · Strings

The question

Write a program to accept a sentence which may be terminated by either '.', '?' or '!' only. The words may be separated by more than one blank space and are in UPPER CASE.

Perform the following tasks: a) Find the number of words beginning an ending with a vowel. b) Place the words which begin and with a vowel at the beginning, followed by the remaining words as they occur in the sentence.

Test your program with the sample data and some random data:

Example 1
INPUT:  ANAMIKA AND SUSAN ARE NEVER GOING TO QUARREL ANYMORE.
OUTPUT: NUMBER OF WORDS BEGINNING AND ENDING WITH A VOWEL = 3
        ANAMIKA ARE ANYMORE AND SUSAN NEVER GOING TO QUARREL

Example 2
INPUT:  YOU MUST AIM TO BE A BETTER PERSON TOMORROW THAN YOU ARE TODAY.
OUTPUT: NUMBER OF WORDS BEGINNING AND ENDING WITH A VOWEL = 2
        A ARE YOU MUST AIM TO BE BETTER PERSON TOMMORROW THAN YOU TODAY

Example 3
OUTPUT: NUMBER OF WORDS BEGINNING AND ENDING WITH A VOWEL = 0
        LOOK BEFORE YOU LEAP

Example 4
INPUT:  HOW ARE YOU@
OUTPUT: INVALID INPUT

Question: ISC 2016 Computer Science Paper 2 (Practical), Question 3, set by the Council for the Indian School Certificate Examinations (CISCE). Solution and video: Vinay Singh.

Java solution

ISC2016Q3.java Download GitHub

import java.util.*;

class Sentence {
    private String sentence, answer;
    private static String vowels = "AEIOUaeiou";

    public Sentence(String sentence) {
        this.sentence = sentence;
        answer = "";
    }

    private static boolean isVowel(char ch) {
        return vowels.indexOf(ch) >= 0;
    }

    public int countWordsLeadingAndTrailingVowels() {
        int count = 0;
        String sentenceCopy = sentence.substring(0, sentence.length() - 1);
        String wordList[] = sentenceCopy.split(" ");
        String beginingPart = "", endingPart = "";
        for (String word : wordList) {
            if (word.length() == 0)
                continue;
            if (isVowel(word.charAt(0)) && isVowel(word.charAt(word.length() - 1))) {
                beginingPart += word + " ";
                count++;
            } else {
                endingPart += word + " ";
            }
        }
        answer = beginingPart + endingPart;
        return count;
    }

    public boolean isValid() {
        String terminators = ".?!";
        return terminators.indexOf(sentence.charAt(sentence.length() - 1)) >= 0;
    }

    public String toString() {
        return answer.trim();
    }
}

class ISC2016Q3 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("INPUT:\t");
        String source = in.nextLine();
        Sentence sentence = new Sentence(source);
        if (sentence.isValid()) {
            int count = sentence.countWordsLeadingAndTrailingVowels();
            System.out.println("OUTPUT:\tNUMBER OF WORDS BEGINNING AND ENDING WITH A VOWEL = " + count);
            System.out.println("\t" + sentence);
        } else {
            System.out.println("OUTPUT:\tINVALID INPUT");
        }
        in.close();
    }
}

Words beginning/ending with vowels

The question

Java solution

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