这是一个判断某一年是否为润年的程序，运行可执行程序Ifleap.exe后，输入具体的年份， 可输出是本年是否为闰年的提示信息。 -This is a judge whether a year for the program in embellish, running the executable Ifleap. After exe, input specific year, Can output is whether this year for the leap year messa