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 a judgment of whether a particular year of a leap year, the running executable Ifleap.exe after importation of specific year, the output this year is a leap year if the message.