Write a C Program to Check Vowel or consonant until the user enters an Alphabet?
The program below asks the user to enter a character until the user enters an alphabet. Then, the program checks whether it is a vowel or a consonant.
Write a C Program to Check Vowel or consonant until the user enters an Alphabet?
#include <stdio.h>
int main()
{
char c;
int isLowercaseVowel, isUppercaseVowel;
do {
printf("Enter an alphabet: ");
scanf(" %c", &c);
} while (!isalpha(c)); /* isalpha() returns 0 if the passed character is not an alphabet 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');
/* evaluates to 1 (true) if either isLowercaseVowel or isUppercaseVowel is true */
if (isLowercaseVowel || isUppercaseVowel)
printf("%c is a vowel.", c);
else
printf("%c is a consonant.", c);
return 0;
}
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