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  1. #include <stdio.h>
  2. #include <ctype.h>
  3.  
  4. int isLegal(char theString[]);
  5.  
  6. int main(void) {
  7. 	char word[50];
  8.     printf("Enter word: ");
  9.     scanf("%49s", word);
  10.  
  11.     if (isLegal(word)) {
  12.         printf("%s is legal\n", word);
  13.     } else {
  14.         printf("%s is illegal\n", word);
  15.     }
  16.     return 0;
  17. }
  18.  
  19. int isLegal(char theString[]) {
  20.     int legal = 0;
  21.     const char vowels[] = "AEIOUY";
  22.  
  23.     for (int i = 0; theString[i] != '\0'; i++) {
  24.         char c = toupper((unsigned char)theString[i]);
  25.  
  26.         // check against vowels
  27.         for (int j = 0; vowels[j] != '\0'; j++) {
  28.             if (c == vowels[j]) {
  29.                 legal = 1;
  30.                 return legal; // we can stop as soon as we find a vowel
  31.             }
  32.         }
  33.     }
  34.     return legal;
  35. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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bvf
stdout
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Enter word: bvf is illegal
https://ideone.com/Tvkmc1
language:
C (gcc 8.3)
created:
25 days ago
visibility:
public

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