luc076.c

Metadata

• Author — Amit Dutta
• Last updated — 08 Feb 2026
• License — MIT License (See the LICENSE file for details)

Problem Statement

Problem Statement

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

Source Code

View on GitHub Download Raw

Printing the code

To print this file, open it on GitHub and click Raw before printing, or use the Download Raw button above and print directly from that page.

#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;
}