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assignment-s-08.c

Problem Statement

Write a program that counts the number of occurrences of each alphabet (A-Z, a-z) in the text entered using Command-Line Arguments.

Metadata

Property Detail
Author Amit Dutta (amitdutta4255@gmail.com)
License MIT
Difficulty Beginner (index: 1 / 10)

Concepts

Beta Feature

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  • Array
  • Pointers
  • Iteration
  • Sorting (possible)
  • Recursion

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Source Code

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

int main(int argc, char *argv[])
{
    int target[2], i, j, count[2], len;
    for (target[0] = 'A', target[1] = 'a'; target[0] <= 'Z', target[1] <= 'z'; target[0]++, target[1]++)
    {
        count[0] = 0;
        count[1] = 0;
        for (i = 1; i < argc; i++)
        {
            len = strlen(argv[i]);
            for (j = 0; j < len; j++)
            {
                if (argv[i][j] == target[0])
                {
                    count[0]++;
                }
                if (argv[i][j] == target[1])
                {
                    count[1]++;
                }
            }
        }
        if (count[0])
        {
            printf("\n\"%c\" found %d times.", target[0], count[0]);
        }
        if (count[1])
        {
            printf("\n\"%c\" found %d times.", target[1], count[1]);
        }
    }
    return 0;
}

Explanation

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Copy the prompt below and paste it into any AI assistant.

    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 (assignment-s-08.c):

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

    int main(int argc, char *argv[])
    {
        int target[2], i, j, count[2], len;
        for (target[0] = 'A', target[1] = 'a'; target[0] <= 'Z', target[1] <= 'z'; target[0]++, target[1]++)
        {
            count[0] = 0;
            count[1] = 0;
            for (i = 1; i < argc; i++)
            {
                len = strlen(argv[i]);
                for (j = 0; j < len; j++)
                {
                    if (argv[i][j] == target[0])
                    {
                        count[0]++;
                    }
                    if (argv[i][j] == target[1])
                    {
                        count[1]++;
                    }
                }
            }
            if (count[0])
            {
                printf("\n\"%c\" found %d times.", target[0], count[0]);
            }
            if (count[1])
            {
                printf("\n\"%c\" found %d times.", target[1], count[1]);
            }
        }
        return 0;
    }