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ccf节日（C语言）#include<stdio.h>    int isrun(int y)    {        if((y%4==0&&y%100!=0)||(y%400==0))        {            return 1;        }else{             return 0;        }    }int main(){    int a,b,c,y1,y2;    long tobefore=0;    int i,j,k;    int todayweek,data;    int month[2][13]={{0,31,28,31,30,31,30,31,31,30,31,30,31},    {0,31,29,31,30,31,30,31,31,30,31,30,31}};    int days[2]={365,366};    scanf("%d%d%d%d%d",&a,&b,&c,&y1,&y2);       //a月第b个星期c     for(i=y1;i<=y2;i++)    {        //toBefore：1850年到i年给出月份a月前总共的天数         tobefore=0;        for(j=1850;j<i;j++)        {            tobefore+=days[isrun(j)];        }    //  printf("年%d\n",tobefore);        //到本月底end        for(k=1;k<a;k++)        {            tobefore+=month[isrun(i)][k];           }        //a月1号前一天是周几        todayweek=tobefore%7+2;        if(todayweek==8)        {            todayweek=1;        }        if(c>=todayweek)        {            data=(b-1)*7+c-todayweek+1;        }else{                  data=b*7+c-todayweek+1;        }        if(month[isrun(i)][a]>=data)        {            printf("%d/%02d/%02d\n",i,a,data);        }else{            printf("none\n");        }    }    return 0;   }