Fortran语言编写的一个年月日和年积日互转的程序源代码。输入年月日，就得到年积日。输入年积日，得到年，月，日，周几，小数点年。-Fortran language and in a plot at DATE Mutual Convert the source code. Enter year, month date, get in plot day. Enter the date on product to get the year,