#!/usr/bin/perl

use CGI qw(:standard);

$num1=int(rand(20));
$num2=int(rand(12));



print header;
print start_html('A Simple Example'),
    h1('A Simple Example'),
    start_form,
    "What's your name? ",textfield('name'),
    p,
    "What is $num1 + $num2? ", textfield('addition'),
    
    p,
    "What's the combination?",
    p,
    checkbox_group(-name=>'words',
		   -values=>['eenie','meenie','minie','moe'],
		   -defaults=>['eenie','minie']),
    p,
    "What's your favorite color? ",
    popup_menu(-name=>'color',
	       -values=>['red','green','blue','chartreuse']),
    p,
    submit,
    end_form,
    hr;

    $correctanswer=($num1 + $num2);
    $cropsplanted=0;
    $cropsnotplanted=0;

if ((param() and param('addition') == "$correctanswer")) {
    $cropsplanted=($cropsplanted + 1);
    $cropsnotplanted=($cropsnotplanted + 0);
    print
        "Correct answer: $correctanswer",
        p,
        "Crops planted: $cropsplanted",
        p,
        "Crops not planted: $cropsnotplanted",
        p,
	"Your name is",em(param('name')),
        p,
        "Your answer to the math problem is ", em(param('addition')),
	p,
	"The keywords are: ",em(join(", ",param('words'))),
	p,
	"Your favorite color is ",em(param('color')),
        
}


if ((param() and param('addition') != "$correctanswer")) {
    $cropsplanted=($cropsplanted + 0);
    $cropsnotplanted=($cropsnotplanted + 1);
    print
        "Correct answer: $correctanswer",
        p,
        "Crops planted: $cropsplanted",
        p,
        "Crops not planted: $cropsnotplanted",
        p,
	"Your name is",em(param('name')),
        p,
        "Your answer to the math problem is ", em(param('addition')),
	p,
	"The keywords are: ",em(join(", ",param('words'))),
	p,
	"Your favorite color is ",em(param('color')),
        
}