Readability_cs50

/*

    Readability solution by Adarsh Singh

*/

#include <stdio.h>
#include <cs50.h>
#include <string.h>
#include <math.h>

int count_letters(string text);  // function for counting letters
int count_words(string text);   // function for counting words
int count_sent(string text);    // function for counting sentences
int colemanformula(double L, double S); //Coleman-Liau index formula


int main(void)
{
    string text = get_string("Text: ");     // user input of text
    float letters = count_letters(text);    // storing the number of letters
    //printf("%.1f letters(s)\n",letters);
    float words = count_words(text);        // storing the number of words
    //printf("%.1f word(s)\n",words);
    float sentences = count_sent(text);     // storing the number of sentences
    //printf("%.1f sentence(s)\n", sentences);

    double L = (letters / words) * 100;     // L is the average number of letters per 100 words in the text
    double S = (sentences / words) * 100;   // S is the average number of sentences per 100 words in the text.

    int grade = colemanformula(L, S);       // calling function of coleman formula

    if (grade < 1)                          // checking grade condition
    {
        printf("Before Grade 1\n");
    }
    else if (grade > 1 && grade <= 16)      // checking grade condition
    {
        printf("Grade %i\n", grade);
    }
    else
    {
        printf("Grade 16+\n");
    }




}

int count_letters(string text)      // function for counting the number of letters in user input
{
    int count = 0;

    for (int i = 0, n = strlen(text); i < n; i++)
    {
        if (text[i] >= 'A' && text[i] <= 'Z')
        {
            count = count + 1;
        }
        else if (text[i] >= 'a' && text[i] <= 'z')
        {
            count = count + 1;
        }
        else if (text[i] == ' ')
        {
            count = count + 0;
        }
    }

    return count;

}

int count_words(string text)    // function for counting the number of words in user input
{
    int words = 0, n = strlen(text);

    for (int i = 0; i <= n; i++)
    {

        if (text[i] == ' ')
        {
            words = words + 1;
        }

    }

    if (text[n - 1] == '.' || text[n - 1] == '!' || text[n - 1] == '?')
    {
        words = words + 1;
    }

    return words;
}

int count_sent(string text)     // function for counting the number of sentences in user input
{
    int sent = 0, n = strlen(text);

    for (int i = 0; i <= n; i++)
    {
        if (text[i] == '!' || text[i] == '.' || text[i] == '?')
        {
            sent = sent + 1;
        }

    }
    return sent;
}

int colemanformula(double L, double S)  // coleman forumla for finding out the grade
{
    double index = 0;
    index = (0.0588 * L) - (0.296 * S) - 15.8;

    int grade = round(index);
    return grade;

}