Check50 problem with Readability

Question

When I submit my readability code check50 says:

Expected Output:
Before Grade 1
Actual Output:
Before Grade 1


Expected Output:
Grade 16+
Actual Output:
Grade 16+

Since my program outputs what is expected, I am not sure how to fix this.

int main(void)
{
    int i, letter = 0, word = 1, sent = 0;

    // prompt user for text

    string text = get_string("Text: ");

    // iterate text for calculations
    for (i = 0; text[i] != '\0'; i++)
    {
        if ((text[i] >= 'A' && text[i] <= 'Z') || (text[i] >= 'a' && text[i] <= 'z')) // count letters
        {
            letter++;
        }

        else if (text[i] == ' ')  // count words
        {
            word++;
        }

        else if (text[i] == '.' || text[i] == '!' || text[i] == '?')  // count sentances
        {
            sent++;
        }

    }
    float l = (100.00 / word) * letter;
    float s = (100.00 / word) * sent;

    float index = 0.0588 * l - 0.296 * s - 15.8;

    int grade = round(index);

    if (grade < 1)
    {
        printf("Before Grade 1");
    }
    else if (grade >= 16)
    {
        printf("Grade 16+");
    }
    else
    {
        printf("Grade %i\n", grade);
    }
    return 0;
}

Answer 1

I could not resolve this and so I rewrote the code from the beginning and it passed. May have just been a glitch in the file since I had rewritten it so many times trying to get it correct. New file, new code. No problem.