");
$i++;
}
end_table();
break;
case BOLT_MODE_SCORE:
$right_ans = $choices[0];
shuffle($choices);
$key = "q_$bolt_ex_index";
if (isset($$key)) {
$response = $$key;
if ($choices[$response] == $right_ans) {
$bolt_ex_score += 1;
}
}
break;
case BOLT_MODE_ANSWER:
$right_ans = $choices[0];
shuffle($choices);
$key = "q_$bolt_ex_index";
if (isset($$key)) {
$response = $$key;
} else {
$response = -1;
}
$i = 0;
start_table();
foreach ($choices as $choice) {
$x = "";
if ($response == $i) $x .= "(You chose this) ";
if ($choice == $right_ans) $x .= "(Right answer)";
row2($choice, $x);
$i++;
}
end_table();
break;
}
$bolt_ex_index++;
}
function bolt_inclusive_choice($choices) {
global $bolt_ex_mode; // input
global $bolt_ex_index; // input
global $bolt_ex_score; // incremental output if SCORE
global $bolt_ex_query_string;
parse_str($bolt_ex_query_string);
switch ($bolt_ex_mode) {
case BOLT_MODE_SHOW:
shuffle($choices);
$i = 0;
start_table();
foreach ($choices as $choice) {
$c = $choice[0];
row2("", $c);
$i++;
}
end_table();
break;
case BOLT_MODE_SCORE:
$i = 0;
$n = count($choices);
$score = 0;
shuffle($choices);
foreach ($choices as $choice) {
$key = "q_".$bolt_ex_index."_$i";
$response = isset($$key);
$r = $choice[1];
$correct = ($r && $response) || (!$r && !$response);
if ($correct) $score += 1./$n;
$i++;
}
$bolt_ex_score += $score;
break;
case BOLT_MODE_ANSWER:
$i = 0;
$n = count($choices);
shuffle($choices);
start_table();
table_header("Choice", "Correct?", "Your answer");
foreach ($choices as $choice) {
$c = $choice[0];
$key = "q_".$bolt_ex_index."_$i";
$response = isset($$key);
$r = $choice[1];
$correct = ($r && $response) || (!$r && !$response);
table_row($c, $r?"yes":"no", $response?"yes":"no");
$i++;
}
end_table();
break;
}
$bolt_ex_index++;
}
function bolt_image_rect($img, $rect) {
global $bolt_ex_mode; // input
global $bolt_ex_index; // input
global $bolt_ex_state; // output if SHOW, else input
global $bolt_ex_score; // incremental output if SCORE
parse_str($bolt_ex_query_string);
switch ($bolt_ex_mode) {
case BOLT_MODE_SHOW:
echo "![]($img";)