`luc075.c`¶

Problem Statement

Write a program that stores a set of names of individuals and abbreviates the first and middle name to their first letter.

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

This concept detection system is still in beta and may occasionally show incorrect or incomplete results.

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 names[5][50];
    char abbr[50];
    int i, j, k, len, space_count;

    printf("Enter 5 full names (First Middle Last):\n");
    for (i = 0; i < 5; i++)
    {
        printf("Name %d: ", i + 1);
        gets(names[i]);
    }

    printf("\nAbbreviated Names:\n");
    for (i = 0; i < 5; i++)
    {
        len = strlen(names[i]);
        space_count = 0;
        k = 0;

        // Add first initial
        abbr[k++] = names[i][0];
        abbr[k++] = '.';
        abbr[k++] = ' ';

        // Find spaces to get subsequent parts
        for (j = 0; j < len; j++)
        {
            if (names[i][j] == ' ')
            {
                space_count++;
                if (space_count == 1) // Found start of Middle name
                {
                    abbr[k++] = names[i][j+1];
                    abbr[k++] = '.';
                    abbr[k++] = ' ';
                }
                else if (space_count == 2) // Found start of Last name
                {
                    // Copy the rest of the last name
                    int m = j + 1;
                    while (names[i][m] != '\0')
                    {
                        abbr[k++] = names[i][m++];
                    }
                    // Stop searching
                    break;
                }
            }
        }
        abbr[k] = '\0';
        printf("%s\n", abbr);
    }

    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 (luc075.c):

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

    int main()
    {
        char names[5][50];
        char abbr[50];
        int i, j, k, len, space_count;

        printf("Enter 5 full names (First Middle Last):\n");
        for (i = 0; i < 5; i++)
        {
            printf("Name %d: ", i + 1);
            gets(names[i]);
        }

        printf("\nAbbreviated Names:\n");
        for (i = 0; i < 5; i++)
        {
            len = strlen(names[i]);
            space_count = 0;
            k = 0;

            // Add first initial
            abbr[k++] = names[i][0];
            abbr[k++] = '.';
            abbr[k++] = ' ';

            // Find spaces to get subsequent parts
            for (j = 0; j < len; j++)
            {
                if (names[i][j] == ' ')
                {
                    space_count++;
                    if (space_count == 1) // Found start of Middle name
                    {
                        abbr[k++] = names[i][j+1];
                        abbr[k++] = '.';
                        abbr[k++] = ' ';
                    }
                    else if (space_count == 2) // Found start of Last name
                    {
                        // Copy the rest of the last name
                        int m = j + 1;
                        while (names[i][m] != '\0')
                        {
                            abbr[k++] = names[i][m++];
                        }
                        // Stop searching
                        break;
                    }
                }
            }
            abbr[k] = '\0';
            printf("%s\n", abbr);
        }

        return 0;
    }

luc075.c¶