made work: count the number of words in a file_t*

src/file.c

@@ -256,3 +256,24 @@ fileNumberLines(file_t* f) {
 
     fclose(fd);
 }
+
+int
+fileCountWords(file_t* f) {
+    int num_words = 0;
+    char prev;
+    for (int i = 0; i < f->length; i++) {
+        for (int j = 0; j < ((vector_t*)vectorGetAt(f->lines, i))->size; j++) {
+            char ch = *((char*)vectorGetAt((vector_t*)vectorGetAt(f->lines, i), j));
+            if (
+                (ch == ' ' && prev != ' ') ||
+                (i == f->length-1 && j == ((vector_t*)vectorGetAt(f->lines, i))->size-1) ||
+                (j == ((vector_t*)vectorGetAt(f->lines, i))->size-1 && j != 0)
+            ) {
+                num_words++;
+            }
+            prev = ch;
+        }
+    }
+
+    return num_words;
+}