C Program to Find Consecutive Occurrence of Vowel in a String

This C Program finds words having consecutive occurrence of any vowel in a string.

Here is a source code of the C program to find the words with consecutive occurrence of any vowel in a string. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C Program to Find the Consecutive Occurrence of any Vowel

```
 * in a String
```
```
 */
```
```
#include <stdio.h>
```
```
#include <string.h>
```
```
#include <ctype.h>
```
```
 
```
```
struct detail
```
```
{
```
```
    char word[20];
```
```
};
```
```
 
```

int update(struct detail [], const char [], int);

```
int vowelcheck(char);
```
```
 
```
```
int main()
```
```
{
```
```
    struct detail s[10];
```
```
    char string[100], unit[20], c;
```
```
    int i = 0, j = 0, count = 0;
```
```
 
```
```
    printf("Enter string: ");
```
```
    i = 0;
```
```
    do
```
```
    {
```
```
        fflush(stdin);
```
```
        c = getchar();
```
```
        string[i++] = c;
```
```
 
```
```
    } while (c != '\n');
```
```
    string[i - 1] = '\0';
```

    printf("The string entered is: %s\n", string);

    for (i = 0; i < strlen(string); i++)

```
    {
```

        while (i < strlen(string) && string[i] != ' ' && isalnum(string[i]))

```
        {
```
```
            unit[j++] = string[i++];
```
```
        }
```
```
        if (j != 0)
```
```
        {
```
```
            unit[j] = '\0';
```

            count = update(s, unit, count);

```
            j = 0;
```
```
        }
```
```
    }
```
```
 
```

    printf("**Words with consecutive vowel**\n");

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    for (i = 0; i < count; i++)
```
```
    {
```
```
        printf("%s\n", s[i].word);
```
```
    }
```
```
 
```
```
    return 0;
```
```
}
```
```
 
```

int update(struct detail s[], const char unit[], int count)

```
{
```
```
    int i, j = 0;
```
```
 
```

    for (i = 0; i < strlen(unit) - 1; i++)

```
    {
```
```
        if (vowelcheck(unit[i]))
```
```
        {
```
```
            if (vowelcheck(unit[i+ 1]))
```
```
            {
```

                /*To avoid duplicate strings*/

                while (j < count && strcmp(s[j].word, unit))

```
                {
```
```
                    j++;
```
```
                }
```
```
                if (j == count)
```
```
                {
```

                    strcpy(s[j].word, unit);

```
 
```
```
                    return (count + 1);
```
```
                }
```
```
            }
```
```
        }
```
```
    }
```
```
 
```
```
    return count;
```
```
}
```
```
 
```
```
int vowelcheck(char c)
```
```
{
```

    char vowel[5] = {'a', 'e', 'i', 'o', 'u'};

```
    int i;
```
```
 
```
```
    c = tolower(c);
```
```
    for (i = 0; i < 5; i++)
```
```
    {
```
```
        if (c == vowel[i])
```
```
        {
```
```
            return 1;
```
```
        }
```
```
    }
```
```
 
```
```
    return 0;
```
```
}
```

$ gcc consecutivevowel.c 
$ ./a.out
Enter string: Who will lead his team to victory
The string entered is: Who will lead his team to victory
**Words with consecutive vowel**
lead
team

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