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, month, day of the week, decimal years.