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Write a function, <tt>isVowel</tt> to check if a character is a vowel (of either case) and return <tt>true</tt> or <tt>false</tt> accordingly.
See if you can utilize the function, <tt>isLowerVowel</tt>, that you wrote in a previous exericse to help implement the bigger function, <tt>isVowel</tt>.

Recall <tt>char tolower(char c)</tt> is available in the <tt><cctype></tt> library.

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Copied from problem cpp/functions/is-lower-vowel (author: redekopp@usc.edu)
Copied from problem cpp/functions/abs_func (author: redekopp@usc.edu)

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Engine
Choices
json list of string, bool pairs
e.g. [["good", true], ["bad", false]]

Correct answer
Template / Reference solution

Template / Reference solution

#include <iostream>
#include <iomanip>
using namespace std;

bool isLowerVowel(char c);
bool isVowel(char c);

// return true if the c is a vowel
bool isVowel(char c)
{
\[
return isLowerVowel(c) || isLowerVowel(tolower(c));

]\
}

// return true if c is a lower-case vowel
bool isLowerVowel(char c)
{
\[
return c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u';

]\
}

// test it
int main() {
// Should return true
cout << boolalpha << isVowel('a') << endl;
cout << boolalpha << isVowel('e') << endl;
cout << boolalpha << isVowel('i') << endl;
cout << boolalpha << isVowel('o') << endl;
cout << boolalpha << isVowel('u') << endl;
cout << boolalpha << isVowel('A') << endl;
cout << boolalpha << isVowel('E') << endl;
cout << boolalpha << isVowel('I') << endl;
cout << boolalpha << isVowel('O') << endl;
cout << boolalpha << isVowel('U') << endl;
// Should return false
cout << boolalpha << isVowel('b') << endl;
cout << boolalpha << isVowel('z') << endl;
return 0;
}

Java test suite
See manual

C++ test suite
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e.g. [{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]
to just run once with no input use [{}]

[
{}
]

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Property	Value
Description html markup shown to student	<p>Write a function, <tt>isVowel</tt> to check if a character is a vowel (of either case) and return <tt>true</tt> or <tt>false</tt> accordingly.</p> <p>See if you can utilize the function, <tt>isLowerVowel</tt>, that you wrote in a previous exericse to help implement the bigger function, <tt>isVowel</tt>.</p> <p></p> <p>Recall <tt>char tolower(char c)</tt> is available in the <tt><cctype></tt> library.</p>
Epilogue html markup shown when solved	remove
Public permissions	remove
Remarks Comments, history, license, etc.	Copied from problem cpp/functions/is-lower-vowel (author: redekopp@usc.edu) Copied from problem cpp/functions/abs_func (author: redekopp@usc.edu) remove
Engine
Choices json list of string, bool pairs e.g. `[["good", true], ["bad", false]]`
Correct answer
Template / Reference solution
Template / Reference solution	#include <iostream> #include <iomanip> using namespace std; bool isLowerVowel(char c); bool isVowel(char c); // return true if the c is a vowel bool isVowel(char c) { \[ return isLowerVowel(c) \|\| isLowerVowel(tolower(c)); ]\ } // return true if c is a lower-case vowel bool isLowerVowel(char c) { \[ return c == 'a' \|\| c == 'e' \|\| c == 'i' \|\| c == 'o' \|\| c == 'u'; ]\ } // test it int main() { // Should return true cout << boolalpha << isVowel('a') << endl; cout << boolalpha << isVowel('e') << endl; cout << boolalpha << isVowel('i') << endl; cout << boolalpha << isVowel('o') << endl; cout << boolalpha << isVowel('u') << endl; cout << boolalpha << isVowel('A') << endl; cout << boolalpha << isVowel('E') << endl; cout << boolalpha << isVowel('I') << endl; cout << boolalpha << isVowel('O') << endl; cout << boolalpha << isVowel('U') << endl; // Should return false cout << boolalpha << isVowel('b') << endl; cout << boolalpha << isVowel('z') << endl; return 0; }
Java test suite See manual
C++ test suite json list of stdin/args tests e.g. `[{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]` to just run once with no input use `[{}]`	[ {} ]
C++ test suite See manual
Forbidden substrings json list of strings e.g. `["for","while"]`	remove
Solution visibility	remove
Java imports json list of importables e.g. `["java.util.*"]`	remove
Override Java classname else defaults to websheet name	remove
Dependent on other websheets? json list of websheet names in this folder e.g. `["DataStructure"]`	remove
Is example? i.e., just a demo	remove
Add compiler flag(s) json list of flags e.g. `["-Wno-unused-variable"]`	remove
Remove default compiler flag(s) json list of flags see default_cppflags e.g. `["-Wno-write-strings"]`	["-Wconversion"] remove

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