// A program that computes the approximate grade level needed to comprehend some text // Please put '.', '?' or '!' after every sentence. #include #include #include // Declaring functions for calculating the number of letters, words, and sentences respectively in a given text float nletters(char *txt); float nwords(char *txt); float nsentences(char *txt); int main(void) { //Prompting the user to enter the text to determine the approximate grade level needed to comprehend some text char t[2000]; scanf("%[^\n]%*c", t); // Calculating the average number of letters per 100 words in the text float L = nletters(t) * 100 / nwords(t); // Calculating the average number of sentences per 100 words in the text float S = nsentences(t) * 100 / nwords(t); // Calculating the Coleman-Liau index int index = round(0.0588 * L - 0.296 * S - 15.8); if (index >= 16) { printf("Grade 16+\n"); } else if (index < 1) { printf("Before Grade 1\n"); } else { printf("Grade %i\n", index); } } // Declaring a function for calculating the number of letters in a given text float nletters(char *txt) { int l = 0; for (int i = 0; txt[i] != '\0'; i++) { if ((txt[i] >= 'a' && txt[i] <= 'z') || (txt[i] >= 'A' && txt[i] <= 'Z')) { l++; } } return l; } // Declaring a function for calculating the number of words in a given text float nwords(char *txt) { int w = 0; for (int i = 0; txt[i] != '\0'; i++) { if ((txt[i] >= 'a' && txt[i] <= 'z') || (txt[i] >= 'A' && txt[i] <= 'Z') || txt[i] == '\'' || txt[i] == '-') { ; } else { if ((txt[i - 1] >= 'a' && txt[i - 1] <= 'z') || (txt[i - 1] >= 'A' && txt[i - 1] <= 'Z') || txt[i - 1] == '\'') { w++; } } } return w; } // Declaring a function for calculating the number of sentences in a given text float nsentences(char *txt) { int s = 0; for (int i = 0; txt[i] != '\0'; i++) { if (txt[i] == '.' || txt[i] == '?' || txt[i] == '!') { s++; } } return s; }

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