What is the mistake in the following program because the output to find the the number of words starting with letter a comes as zero.

Question

1.00/5 (1 vote)

See more:

Java

class Car
{
   static String a;
   static String str="";
   static int count=0;
   public static void input()
   {
       Scanner scan=new Scanner(System.in);
       System.out.println("Enter the sentence :");
       a=scan.nextLine();
    
     String str=a.toUpperCase();
    str=""+str;
}
    public static void Vowels()
    {
        for(int i=0;i<str.length()-1;i++)
        {
            char b=str.charAt(i);
            if(Character.isWhitespace(b)&&(char)(b+1)=='A')
            {
                count++;
            }
        }
        System.out.println("The total number of words starting with letter 'A' is :"+count);
    }

What I have tried:

The above code is what I tried.

Posted 25-May-20 9:21am

Member 14843380

Updated 25-May-20 10:12am

Patrice T

v3

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

phil.o · Answer 1 · 2020-05-25T09:40:00

b+1 will give you the character which is directly following the character in b in an ASCII table, not the next character in input string. Moreover, your code only tests for uppercase A, but will fail at finding a word beginning with a lowercase a.
I won't write it for you since it is important for you to understand what is wrong, and and to correct it yourself. Try it, this is not difficult at all; and you will feel proud by having solved it by yourself.

Patrice T · Answer 2 · 2020-05-25T10:13:00

Java

char b=str.charAt(i); // here, b is the letter at position i
if(Character.isWhitespace(b)&&(char)(b+1)=='A') // here b+1 is next letter in alphabet, not next letter in sentence

try

Java

char b=str.charAt(i);
char c=str.charAt(i+1);
if(Character.isWhitespace(b)&& c=='A')

-----
By the way, your count will be wrong if first word starts with a 'a'. and you forgot to call the function 'vowels'
-----
Your code do not behave the way you expect, or you don't understand why !

There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]
http://docs.oracle.com/javase/7/docs/technotes/tools/windows/jdb.html[^]
https://www.jetbrains.com/idea/help/debugging-your-first-java-application.html[^]

The debugger is here to only show you what your code is doing and your task is to compare with what it should do.

What is the mistake in the following program because the output to find the the number of words starting with letter a comes as zero.

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0