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luc076.c

Problem Statement

Write a program to count the number of occurrences of any two vowels in succession in a line of text.

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Property Detail
Author Amit Dutta amitdutta4255@gmail.com
Date 08 Feb 2026
License MIT License (See the LICENSE file for details)

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Source Code

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>

int is_vowel(char c)
{
    c = tolower(c);
    return (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u');
}

int main()
{
    char str[100];
    int i, count = 0;

    printf("Enter a line of text: ");
    gets(str);

    printf("Occurrences found:\n");
    for (i = 0; str[i] != '\0'; i++)
    {
        if (is_vowel(str[i]) && is_vowel(str[i+1]))
        {
            printf("'%c%c' ", str[i], str[i+1]);
            count++;
        }
    }

    printf("\n\nTotal number of successive vowels: %d\n", count);

    return 0;
}