Merge pull request keshavsingh4522#655 from rajsanu/master

predict grade-level of text

C/readability.c

@@ -0,0 +1,61 @@
+// predicts grade-level of a text
+// based on Coleman-Liau index
+
+
+#include<cs50.h>
+#include<math.h>
+#include<string.h>
+#include<stdio.h>
+
+int main(void)
+
+{
+ //set initial count for letters,words,sentences to 0
+ int letters = 0;
+ int words = 1;
+ int sentences = 0;
+
+ //promot user for text
+ string s = get_string("Text:\n");
+
+ //calculate number of letters,words and sentences
+ for (int i = 0, n = strlen(s); i < n; i++)
+ {
+ if ((s[i] >= 65 && s[i] <= 90) || (s[i] >= 97 && s[i] <= 122))
+ {
+ letters++;
+ }
+
+ if (s[i] == ' ')
+ {
+ words++;
+ }
+
+ if ((s[i] == '.' || s[i] == '?') || s[i] == '!')
+ {
+ sentences++;
+ } 
+ }
+
+ // calculate "value" of index 
+ float value = ((0.0588 * 100 * ((float) letters / (float) words)) - (0.296 * 100 * ((float) sentences / (float) words)) - 15.8);
+
+ // round-off index value to nearest integer
+ int index = round(value);
+
+ //printf grade of the text
+ if (index >= 1 && index < 16)
+ {
+ printf("Grade %i\n", index);
+ }
+
+ else if (index >= 16)
+ {
+ printf(" Grade 16+\n");
+ }
+
+ else if (index < 1)
+ {
+ printf("Before Grade 1\n");
+ }
+}