Question

Abhijeet, a software programmer wants to create a program to check if the
character entered by user is a vowel or a consonant. Which type of loop he
should use? Explain the role of ‘==’operator and ‘||’ operator?
This is in C++

Answer 1

Answer:

In this example, if...else statement is used to check whether an alphabet entered by the user is a vowel or a constant.

To understand this example, you should have the knowledge of the following C++ programming topics:

C++ if, if...else and Nested if...else

Five alphabets a, e, i, o and u are known as vowels. All other alphabets except these 5 alphabets are known as consonants.

This program assumes that the user will always enter an alphabet.

Example: Check Vowel or a Consonant Manually

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Output

The character entered by the user is stored in variable c.

The isLowerCaseVowel evaluates to true if c is a lowercase vowel and false for any other character.

Similarly, isUpperCaseVowel evaluates to true if c is an uppercase vowel and false for any other character.

If both isLowercaseVowel and isUppercaseVowel is true, the character entered is a vowel, if not the character is a consonant.

The isalpha() function checks whether the character entered is an alphabet or not. If it is not, it prints an error message.

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Explanation:

I hope this helps for you

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Answer 2

Explanation:

¤Five alphabets a, e, i, o and u are known as vowels. All other alphabets except these 5 alphabets are known as consonants.

¤This program assumes that the user will always enter an alphabet.

●include <iostream> using namespace std; int main() { char c; bool isLowercaseVowel, isUppercaseVowel; cout << "Enter an alphabet: "; cin >> c; // evaluates to 1 (true) if c is a lowercase vowel isLowercaseVowel = (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u'); // evaluates to 1 (true) if c is an uppercase vowel isUppercaseVowel = (c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U'); // show error message if c is not an alphabet if (!isalpha(c)) printf("Error! Non-alphabetic character."); else if (isLowercaseVowel || isUppercaseVowel) cout << c << " is a vowel."; else cout << c << " is a consonant."; return 0;Get App

□C++ Program to Check Whether a character is Vowel or Consonant.

■In this example, if...else statement is used to check whether an alphabet entered by the user is a vowel or a constant.

■To understand this example, you should have the knowledge of the following C++ programming topics:

♧C++ if, if...else and Nested.

☆《Five alphabets a, e, i, o and u are known as vowels. All other alphabets except these 5 alphabets are known as consonants.

●This program assumes that the user will always enter an alphabet.》

♤Example: Check Vowel or a Consonant Manually#include <iostream> using namespace std; int main() { char c; bool isLowercaseVowel, isUppercaseVowel; cout << "Enter an alphabet: "; cin >> c; // evaluates to 1 (true) if c is a lowercase vowel isLowercaseVowel = (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u'); // evaluates to 1 (true) if c is an uppercase vowel isUppercaseVowel = (c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U'); // show error message if c is not an alphabet if (!isalpha(c)) printf("Error! Non-alphabetic character."); else if (isLowercaseVowel || isUppercaseVowel) cout << c << " is a vowel."; else cout << c << " is a consonant."; return 0; }

¤Output

•Enter an alphabet: u u is a vowel.

•The character entered by the user is stored in variable c.

•The isLowerCaseVowel evaluates to true if c is a lowercase vowel and false for any other character.

•Similarly, isUpperCaseVowel evaluates to true if c is an uppercase vowel and false for any other character.

•If both isLowercaseVowel and isUppercaseVowel is true, the character entered is a vowel, if not the character is a consonant.

•The is alpha() function checks whether the character entered is an alphabet or not. If it is not, it prints an error message.