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 in a particular year a leap year for the program, run executable programs Ifleap.exe, enter the specific year, this year whether to output the message as a leap year.