阅读以下说明和C语言函数，将应填入 （n） 处的字句写在答题纸的对应栏内。
【说明】
已知1900年1月1日是星期一，下面的函数count_5_13(int year)用于计算给定的年份year中有几个“黑色星期五”。“黑色星期五”指既是.13日又是星期五的日期。
函数count_5_13(int year)首先算出年份year的1月13日是星期几，然后依次计算每个月的13日是星期几，若是星期五，则计数。
程序中使用了函数isLeapYear(int year)，其功能是判断给定年份是否为闰年，返回值为1(或0)分别表示year是（或不是）闰年。
【C语言函数】
正确答案及解析
正确答案
解析
（1）days++，days+=1或其他等价形式
（2）date==5
（3）m＜=12
（4）isLeapYear(Year)
（5）date
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