很有意思的问题，1111.11*100 为什么不等于 111111

 

---

<?php
//echo 1111.11*100;
//echo intval(1111.11*100);
if(1111.11*100 == 111111) {
    echo 'that is right';
}else {
    echo 'that is wrong';
}
printf('%.20f',1111.11*100);
?>

 

 

---

页面的输出结果是that is wrong