fix ex2

week02/ex2.c

@@ -12,7 +12,9 @@ int main() {
     s[i] = '\0';
     // i is already the size of s. I've used strlen to follow the 'hints'
     // section.
+    putc('\"', stdout);
     for (i = strlen(s) - 1; i >= 0; --i) {
         putc(s[i], stdout);
     }
+    putc('\"', stdout);
 }