C语言万年历系统打印日历，运行时月份出错，求解答

Question

问题：农历的月份和日期出错

请问怎么修改代码解决这个问题，下面是代码。感谢帮助

```c
#include<stdio.h>
#include<stdlib.h>
#include <conio.h>
#include"string.h"
#include"math.h"
/**********************************************************************************
*                            函数声明
***********************************************************************************/
int Leap_year(int year);
int Month_Day(int year,int month);
int Year_Day(int year,int month,int day);
int Week_Day1(int year,int month,int day);
char *Week_Day2(int number);
void Menu1(int year,int month,int day);
void Menu2(int year,int month);
int Menu3(int year,int month,int day);
void Month_Display(int year,int month);
void Lunar_Calendar(int year ,int month,int day);
void Day_Display(int year,int month,int day);
/*******************************************************************************
*   函数名：闰年判断
*   入口参数：year
*   返回参数：闰年返回1 否则返回0
********************************************************************************/
int Leap_year(int year) {
    if(year%4==0&&year%100!=0||year%400==0)
        return 1;
    else
        return 0;
}
/**********************************************************************************
*  函数名：月份天数确定
*  入口参数：year，month
*  返回参数：今年该月的天数
*  调用函数：int Leap_year(int year)
**********************************************************************************/
int Month_Day(int year,int month) {
    int a[12]= {31,28,31,30,31,30,31,31,30,31,30,31}; /*定义数组确定12个月每个月的天数*/
    if(Leap_year(year))
        a[1]=29;
    return a[month-1];
}
/*************************************************************************************
*  函数名：天数查询->查询该天是今年的第几天
*  入口参数：year，month，day
*  返回参数：该天是今年的第几天
*  调用函数：day1(int year,int month)
**************************************************************************************/
int Year_Day(int year,int month,int day) {
    int i,sum=0;
    for(i=1; i<month; i++) {
        sum+=Month_Day(year,i);
    }
    sum+=day;
    return sum;
}
/****************************************************************************************
*   函数名：天数查询->查询该天是本周的第几天
*   入口参数：year，month，day
*   返回参数：返回该天是本周的第几天
*   调用函数：day2(int year,int month,int day)
****************************************************************************************/
int Week_Day1 ( int year, int month, int day ) {
    if(month ==1 || month ==2){
        year -=1 ;
        month +=12;
    }
    int number = ( day + 2 * month + 3 * ( month + 1 ) / 5 + year + year / 4 - year / 100 + year / 400 +1) % 7; //基姆拉尔森计算公式
//    printf("%d年%d月%d日，number+1=%d\n",year,month,day,number+1);
    return number; //+ 1;
}

/***********************************************************************************
*  函数名：星期查询
*  入口参数：number
*  返回参数：星期
**********************************************************************************/
char *Week_Day2(int number) {
    switch(number) {
        case 0:
            return "星期日";
        case 1:
            return "星期一";
        case 2:
            return "星期二";
        case 3:
            return "星期三";
        case 4:
            return "星期四";
        case 5:
            return "星期五";
        case 6:
            return "星期六";
        default:
            return "错误!请您重新输入。";
    }
}
/*****************************************************************************
*   函数名：菜单1年历查询->输出年，月，日，星期,农历
*   入口参数：year month day
*   调用函数：int week1(int year,int month,int day)
*             int runnian(int year)
*****************************************************************************/
void Menu1(int year,int month,int day) {
    int number=Week_Day1(year,month,day);
    if(Leap_year(year))printf("闰年");
    else printf("平年");
    printf(" %d 年  %d 月 %d 日%10s %s",year,month,day,Week_Day2(number));
    Lunar_Calendar( year , month,day);//输出当前日期的农历
}
/*******************************************************************************************
*   函数名：菜单2月历查询->生成日历格式
*   入口参数：year，month
*   调用函数：int day1(int year,int month)
*             int week1(int year,int month,int day)
*******************************************************************************************/
void Menu2(int year,int month) {
    int max,number,i,j=1;
    max=Month_Day(year,month);//计算该月总天数
    number=Week_Day1(year,month,1);
    printf("%2s%2s%2s%2s%2s%2s%2s\n","  星期日 ","  星期一 ","  星期二","  星期三 "," 星期四 ","  星期五 "," 星期六 ");
    for(i=0; i<number; i++) {
        if(number<7){
            printf("        ");
        }
    }
    while(j<=max) { //该月的天数
        printf("%8d",j);
        if(i%7==6) {
            printf("\n");
        }
        i++;
        j++;
    }
    printf("\n\n");
}
/*****************************************************************************
*  函数名：菜单3日历查询->输入参数检查
*  入口参数：year，month，day
*  返回参数 当输入无效时返回0 否则返回1
*****************************************************************************/
int Menu3(int year,int month,int day) {
    if(year<0||month<1||month>12||day<1||day>Month_Day(year,month))
        return 0;
    else
        return 1;
}
/*********************************************************************************
*  函数名：年历查询
*  入口参数：year
*  调用函数：int Leap_year(int year)
*********************************************************************************/
void Year(int year) {
    int i;
    printf("\n");
    for(i=1; i<=12; i++) {
        Month_Display(year,i);
    }
}
/*************************************************************************************
*  函数名：月历查询
*  入口参数：year，month
*  调用函数：int Leap_year(int year)
*           void x2(int year,int month)
*  输出：年月并输出日历格式
*************************************************************************************/
void Month_Display(int year,int month) {
    if(Leap_year(year))
        printf("闰年");
    else printf("平年");
    printf(" %d 年 %d 月\n\n",year,month);
    Menu2(year,month);
}
/*************************************************************************************
*   函数名：农历查询
*   入口参数：year,month,day
*   调用函数：
*************************************************************************************/
void Lunar_Calendar(int year ,int month,int day) {
    /*天干名称*/
    const char *cTianGan[] = {"甲","乙","丙","丁","戊","己","庚","辛","壬","癸"};
    /*地支名称*/
    const char *cDiZhi[] = {"子","丑","寅","卯","辰","巳","午",
                            "未","申","酉","戌","亥"
                           };
    /*属相名称*/
    const char *cShuXiang[] = {"鼠","牛","虎","兔","龙","蛇",
                               "马","羊","猴","鸡","狗","猪"
                              };
    /*农历日期名*/
    const char *cDayName[] = {"*","初一","初二","初三","初四","初五",
                              "初六","初七","初八","初九","初十",
                              "十一","十二","十三","十四","十五",
                              "十六","十七","十八","十九","二十",
                              "廿一","廿二","廿三","廿四","廿五",
                              "廿六","廿七","廿八","廿九","三十"
                             };
    /*农历月份名*/
    const char *cMonName[] = {"*","正","二","三","四","五","六",
                              "七","八","九","十","十一","腊"
                             };
    /*公历每月前面的天数*/
    const int wMonthAd[12] = {0,31,59,90,120,151,181,212,243,273,304,334};
    /***************************************************************
    *农历数据计算方式：用十进制保存
    *例如：1、农历每个月的大小；2、今年是否有闰月，闰几月以及闰月的大小。
    用一个整数来保存这些信息就足够了。具体的方法是：用一位来表示一个月的大
    小，大月记为1，小月记为0，这样就用掉12位（无闰月）或13位（有闰月），再
    用高4位来表示闰月的月份，没有闰月记为0。比如说，2000年的信息数据是是0xC96
    化为十进制就是3222,化成二进制就是110010010110B，表示的含义是指1、2、5、8、10、11月大，其余月小
    ****************************************************************/
    /*农历数据*/
    const int wNongliData[100] = {
        2635,333387,1701,1748,267701,694,2391,133423,1175,396438
        ,3402,3749,331177,1453,694,201326,2350,465197,3221,3402
        ,400202,2901,1386,267611,605,2349,137515,2709,464533,1738
        ,2901,330421,1242,2651,199255,1323,529706,3733,1706,398762
        ,2741,1206,267438,2647,1318,204070,3477,461653,1386,2413
        ,330077,1197,2637,268877,3365,531109,2900,2922,398042,2395
        ,1179,267415,2635,661067,1701,1748,398772,2742,2391,330031
        ,1175,1611,200010,3749,527717,1452,2742,332397,2350,3222
        ,268949,3402,3493,133973,1386,464219,605,2349,334123,2709
        ,2890,267946,2773,592565,1210,2651,395863,1323,2707,265877
    };
 
    static int wCurYear,wCurMonth,wCurDay;
    static int nTheDate,nIsEnd,m,k,n,i,nBit;
    char szNongli[30], szNongliDay[10],szShuXiang[10];
    /*—取当前公历年、月、日—*/
    wCurYear = year;
    wCurMonth = month;
    wCurDay = day;
    /*—计算到初始时间1921年2月8日的天数：1921-2-8(正月初一)—*/
    /*1921年 鸡年 辛酉年*/
    nTheDate = (wCurYear-1921) * 365 + (wCurYear-1921) / 4 + wCurDay + wMonthAd[wCurMonth-1]-38;
    if((!(wCurYear % 4)) && (wCurMonth > 2)) //如今年阳历是闰年（2月有29天），而且当前月份大于2月，经历的总天数加1
        nTheDate = nTheDate + 1;
    /*–计算农历天干、地支、月、日—*/
    nIsEnd = 0;
    m = 0;
    while(nIsEnd != 1) {
        if(wNongliData[m] < 4095) //4095:111111111111 判断是否有闰月  小于则没有闰月 扣掉一个月
            k = 11;
        else
            k = 12;
        n = k;
        while(n>=0) {
            //获取wNongliData(m)的第n个二进制位的值
            nBit = wNongliData[m];
            for(i=1; i<n+1; i++) //大小月确定
                nBit = nBit/2;
            nBit = nBit % 2; //取出农历数据前12位的二进制数据
            if (nTheDate <= (29 + nBit)) { //若为1则是大月 天数有30天
                nIsEnd = 1; //大月
                break;
            }
            nTheDate = nTheDate-29-nBit;//天数
            n = n-1;
        }
        if(nIsEnd)
            break;
        m = m + 1;
    }
    wCurYear =1921 + m;
    wCurMonth =k-n + 1; //农历月份
    wCurDay = nTheDate; //农历天数
    if (k == 12) { //存在闰月
        if (wCurMonth == wNongliData[m] / 65536 + 1)//保存闰月是几月
            wCurMonth =1-wCurMonth;
        else if (wCurMonth > wNongliData[m] / 65536 + 1)
            wCurMonth = wCurMonth-1;
    }
    /*–生成农历天干、地支、属相 ==> wNongli–*/
    /************************************************************************
    * 计算公式： 天干：（农历年份-3）Mod 10
    * 地支：（农历年份-3）Mod 12
    * 生肖：(Year-3) Mod 12
    ************************************************************************/
    printf(" %s年 ",cShuXiang[(wCurYear - 4) % 12]);//属相
    printf("%s",cTianGan[(wCurYear - 4)  % 10]);//天干
    printf("%s年 ",cDiZhi[(wCurYear - 4) % 12]);//地支
    /*–生成农历月、日 ==> wNongliDay–*/
    if (wCurMonth < 1) { //闰月
        printf("闰");
        printf("%s",cMonName[-1 * wCurMonth]);//农历月份确定
        printf("月");
        printf("%s",cDayName[wCurDay]);//农历日期确定
        printf(" %s\n",Week_Day2(Week_Day1(year,month,day)));//星期的确定
    } else {
        printf("%s",cMonName[wCurMonth]);
        printf("月 ");
        printf("%s",cDayName[wCurDay]);
        printf(" %s\n",Week_Day2(Week_Day1(year,month,day)));
    }
}
/**********************************************************************
*   函数名：日历显示
*   入口参数：year，month，day
*   调用函数：void Menu1(int year,int month，int day)
**********************************************************************/
void Day_Display(int year,int month,int day) {
    printf("\n");
    Menu1(year,month,day);
}
int main( ) {
    int year,month,day,a,b,i;
    int Event,Event1,Event2;
    char name[20];
    FILE *fp;
 
    printf("            ---------------------------------------------------------------\n");
    printf("                                                                           \n");
    printf("                               欢迎进入万年历查询系统                      \n");
    printf("                                                                           \n");
    printf("            ---------------------------------------------------------------\n\n");
    while(1) {
        printf("\n\n请按任意键进入查询系统...");
        getch();
        printf("\n\n");
        printf("          1 年历 2 月历 3 日历 4 农历查询 5 退出 \n");
        printf("               请输入您的选择<1~5>,按回车键确定: ");
        scanf("%d",&b);
        /****************************************************************************************************************
        *                                        菜单选项
        ****************************************************************************************************************/
        switch(b) {
            case 1:
                printf("\n请输入您要查的年份: ");
                scanf("%d",&year);
                a=Menu3(year,1,1);//输入参数检查
                if(a==0) {
                    printf("错误!请您重新输入。\n");/*输入值异常时报错*/
                    break;
                }
                Year( year);
                /*for(i=1;i<=12;i++)
                {
                         Month_Display(year,i);
                }*/
                break;
            case 2:
                printf("\n请输入您要查的年和月，年月之间用空格隔开: ");
                scanf("%d%d",&year,&month);
                a=Menu3(year,month,1);
                if(a==0) {
                    printf("错误!请您重新输入。\n");
                    break;
                }
                Month_Display(year,month);
                break;
            case 3:
                printf("\n请输入您要查的年月日，年月日之间用空格隔开: ");
                scanf("%d%d%d",&year,&month,&day);
                a=Menu3(year,month,day);
                if(a==0) {
                    printf("错误!请您重新输入!\n");
                    break;
                }
                Day_Display(year,month,day);
                break;
            case 4:
                printf("请输入您需要查询的日期，年月日中间用空格隔开");
                scanf("%d%d%d",&year,&month,&day);
                if(month>12||day>31) {
                    printf("错误!请您重新输入\n");
                    break;
                }
                Lunar_Calendar(year,month,day);
                break;
            case 5:
                exit(0);
                break;
            default:
                printf("错误!请您重新输入!\n\n");
        }
    }
}
 

```

Answer 1

利用基姆拉尔森计算公式计算星期，1，2月要特殊处理，只适用3~12月
https://zhuanlan.zhihu.com/p/452911148
所以只要改函数Week_Day1 如下

int Week_Day1 ( int year, int month, int day ) {
    if(month ==1 || month ==2){
        year -=1 ;
        month +=12;
    }
    int number = ( day + 2 * month + 3 * ( month + 1 ) / 5 + year + year / 4 - year / 100 + year / 400 +1) % 7; //基姆拉尔森计算公式
//    printf("%d年%d月%d日，number+1=%d\n",year,month,day,number+1);
    return number; //+ 1;
}