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  1. #include <stdio.h>
  2.  
  3. int main() {
  4.     char str[100];
  5.     int i, count = 0;
  6.  
  7.     printf("Enter a string: ");
  8.     gets(str);  
  9.     for(i = 0; str[i] != '\0'; i++) {
  10.         char ch = str[i];
  11.         if (ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u'||
  12.             ch=='A'||ch=='E'||ch=='I'||ch=='O'||ch=='U') {
  13.             count++;
  14.         }
  15.     }
  16.  
  17.     printf("Number of vowels: %d\n", count);
  18.     return 0;
  19. }
  20.  
  21.  
  22.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin 
HELLO OO
stdout 
Enter a string: Number of vowels: 4
https://ideone.com/JfA6XU
language:
C (gcc 8.3)
created:
18 hours ago
visibility:
public

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