Data commit

Task/Letter-frequency/C/letter-frequency.c

@@ -0,0 +1,19 @@
+/* declare array */
+int frequency[26];
+int ch;
+FILE* txt_file = fopen ("a_text_file.txt", "rt");
+
+/* init the freq table: */
+for (ch = 0; ch < 26; ch++)
+    frequency[ch] = 0;
+
+while (1) {
+    ch = fgetc(txt_file);
+    if (ch == EOF) break; /* end of file or read error.  EOF is typically -1 */
+
+    /* assuming ASCII; "letters" means "a to z" */
+    if ('a' <= ch && ch <= 'z')      /* lower case */
+        frequency[ch-'a']++;
+    else if ('A' <= ch && ch <= 'Z') /* upper case */
+        frequency[ch-'A']++;
+}