My Coleman-Liau index gives the wrong answer

Question

the program seems to be running fine but I don't know what went wrong in the index, it just doesn't give the right answer.

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



int main(void)
{
    float L, S;//average number of letters and sentences per 100 words
    string text;
    int count_letters = 0, count_words = 0, count_sentences = 0;//number of letters, sentences and words


text = get_string("Text: ");//get user input

for (int i = 0; text[i] != '\0'; i ++)
{
        if (isalpha(text[i]))//count letters
        {
            count_letters ++;
        }
        
        if (isspace(text[i]))//count words
        {
            count_words ++;
        }
        
        if (sentences[0][i] == '?' || sentences[0][i] == '!' || sentences[0][i] == '.')//count sentences
        {
            count_sentences ++;
        }
}
printf("%i letter(s)\n", count_letters);
printf("%i word(s)\n", count_words + 1);
printf("%i sentence(s)\n", count_sentences);

L = (float)count_letters / /*(float)*/((count_words + 1) * 100);
S = (float)count_sentences / /*(float)*/((count_words + 1) * 100);
float index = (0.0588 * (L - 0.296) * (S - 15.8));//Coleman-Liau index
int answer = round(index);
if (answer > 16)
{
    printf("Grade 16+\n");
}
else if (answer < 1)
{
    printf("Before 1\n");
}
else
{
    printf("Grade %i\n", answer);
}
printf("%i\n", answer);
}

Answer 1

Your approach is very different and difficult (but don't need to worry, instead I appreciate you that you have taken something next level to solve this PSET)

Obviously in computer science there is always more than one way for approaching a problem

Try to think more effectively and efficiently to think about the problem

Some hints are:

• Do you really think that you have to copy the text provided to you inside a memory called array?

• Do you really need to go inside the array to count the letters words and sentences?

• By declaring array[i][j] actually it creates a 2D array which looks like a table like content containing rows and columns

I hope this helps

Answer 2

You've taken count_letters and count_sentences as float. That approach is right. But float data type probably overflows and you should use floor() to correct them. I used floor() to assign fixed floats and it worked. I suggest you to use count_words as float only because this way you have only one extra float and answer will be the same.

float count_words = 0

The code you wrote.

count_words += 1

L = count_letters / floor((count_words)) * 100);

S = count_sentences / floor((count_words_f)) * 100);