`luc073.c`¶

Problem Statement

Write a program to delete all vowels from a sentence. Assume that the sentence is not more than 80 characters long.

Metadata¶

Property	Detail
Author	Amit Dutta amitdutta4255@gmail.com
Date	08 Feb 2026
License	MIT License (See the LICENSE file for details)
Difficulty	Beginner (index: 1 / 10)

Concepts¶

Beta Feature

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Array
Sorting (possible)
Iteration

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Source Code¶

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

int main()
{
    char str[81], res[81];
    int i, j = 0;

    printf("Enter a sentence (max 80 chars): ");
    gets(str); // Note: gets is deprecated, but used here for simplicity as per classic C texts

    for (i = 0; str[i] != '\0'; i++)
    {
        char ch = tolower(str[i]);
        if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u')
        {
            // Skip vowel
            continue;
        }
        else
        {
            res[j] = str[i];
            j++;
        }
    }
    res[j] = '\0';

    printf("Sentence without vowels: %s\n", res);

    return 0;
}

Explanation¶

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    You are explaining a C programming code to a beginner.

    STRICT RULES:

    - Only use the given code. Do NOT assume anything not present.

    - Do NOT add extra examples.

    - Keep explanation clear and short.

    - If something is unclear, say "Not clear from code".

    - Follow the exact format below. Do NOT change headings.

    FORMAT:

    [START]

    ## What it does

    (Explain the overall purpose in 1-2 sentences)

    ## Step-by-step

    (Explain how the code works in steps, simple language)

    ## Key Concepts

    (List concepts like loop, condition, function, etc.)

    ## Notes

    (Mention any limitations, errors, or assumptions)

    [END]

    CODE (luc073.c):

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

    int main()
    {
        char str[81], res[81];
        int i, j = 0;

        printf("Enter a sentence (max 80 chars): ");
        gets(str); // Note: gets is deprecated, but used here for simplicity as per classic C texts

        for (i = 0; str[i] != '\0'; i++)
        {
            char ch = tolower(str[i]);
            if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u')
            {
                // Skip vowel
                continue;
            }
            else
            {
                res[j] = str[i];
                j++;
            }
        }
        res[j] = '\0';

        printf("Sentence without vowels: %s\n", res);

        return 0;
    }

luc073.c¶