改进带码,在php的代码最后加一个else{.3 =号这个输入框可以用input的submit来做,只要点击submit表单里的内容就传给php了...www.cnblogs.com

DOCTYPE html html lang= en head meta charset= UTF-8 title计算器/title /head body form method=... php header( content-type:text/html;charset=utf-8 ); $first=$_POST['first'...www.cnblogs.com