这是一个计算个人所得税和判断年份是否是闰年的简单程序，添加了输入的判断，以及输入出错的提示！适合广大 DELPHI 初学者！-This is a calculation of personal income tax and judgment year is a leap year if the simple procedure, add the importation of judgment and input errors tips! For the majority of Delphi be