[原创]C语言实现：万年历

        经过近这几天的努力，终于写完了这个"万年历"的程序了，共享一下, 特别是同"勉"共享

[需求]

    请打印出任意年份的日历

[代码]

#include <stdio.h>

#define LMonth 31
#define SMonth 30
#define VMonth 28

typedef enum {
Sun,
Mon,
Jue,
Wed,
Thu,
Fri,
Sat
} WEEK;

typedef enum {
January = 1,
February,
Match,
Apirl,
May,
June,
July,
August,
September,
October,
November,
December
} MONTH;

void printMonHead(void)
{
printf(" Sun Mon Jue Wed Thu Fri Sat\n");
}

void printMonth(const WEEK firstDay, int length )
{
WEEK weekDay = firstDay % 7;

int i;

printMonHead();

for (i=0; i<weekDay;++i)
{
printf(" ");
}

for(i=1;i<=length;++i)
{
weekDay = (++weekDay)%7;
printf("%7d", i);

if(weekDay==0) printf("\n");
}

printf("\n");
}


int isLeapYear(const int yr)
{
return ( yr%( yr%100 ? 4:400) ? 0 : 1);
}


int getYearDay(const int year)
{

int lastYear = year-1;
int yearNum = lastYear-1899;

int walker,counter=0;
for(walker=1900; walker < year; ++walker)
{
if(isLeapYear(walker)==1)
++counter;
}

return (365*yearNum+counter+1)%7;
}


void printYear(const int y)
{
WEEK yDay = getYearDay(y);
int vDay = isLeapYear(y);

int monWeeks[13];
int monLen [13];

monLen[0]=0;
monLen[January]=31; monLen[February]=28+vDay; monLen[Match]=31;
monLen[Apirl]=30; monLen[May]=31; monLen[June]=30;
monLen[July]=31; monLen[August]=31; monLen[September]=30;
monLen[October]=31; monLen[November]=30; monLen[December]=31;

monWeeks[0]=0;
monWeeks[January] = yDay;
monWeeks[February] = ((monWeeks[January] +monLen[January] )%7);
monWeeks[Match] = ((monWeeks[February] +monLen[February] )%7);
monWeeks[Apirl] = ((monWeeks[Match] +monLen[Match] )%7);
monWeeks[May] = ((monWeeks[Apirl] +monLen[Apirl] )%7);
monWeeks[June] = ((monWeeks[May] +monLen[May] )%7);
monWeeks[July] = ((monWeeks[June] +monLen[June] )%7);
monWeeks[August] = ((monWeeks[July] +monLen[July] )%7);
monWeeks[September] = ((monWeeks[August] +monLen[August] )%7);
monWeeks[October] = ((monWeeks[September] +monLen[September] )%7);
monWeeks[November] = ((monWeeks[October] +monLen[October] )%7);
monWeeks[December] = ((monWeeks[November] +monLen[November] )%7);

int i;
for(i=January; i<=December; ++i)
{
printf("\n-------------------------------------------------\n");
printf(" %d, %d \n",y,i);
printf("-------------------------------------------------\n");
printMonth(monWeeks[i],monLen[i]);
printf("\n");
}

return;
}


int main(void)
{

int y;
int quit=0;

do
{
printf("Please enter which Year to Print For You (0 to quit): ");
scanf("%d",&y);
printf("\n");

if(y==0)
quit = 1;
else
printYear(y);

}while(!quit);

return 0;
}

输出

Please enter which Year to Print For You (0 to quit): 1973

-------------------------------------------------                      1946, 1                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat                     1      2      3      4      5       6      7      8      9     10     11     12      13     14     15     16     17     18     19      20     21     22     23     24     25     26      27     28     29     30     31     -------------------------------------------------                      1946, 2                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat                                          1      2       3      4      5      6      7      8      9      10     11     12     13     14     15     16      17     18     19     20     21     22     23      24     25     26     27     28     -------------------------------------------------                      1946, 3                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat                                          1      2       3      4      5      6      7      8      9      10     11     12     13     14     15     16      17     18     19     20     21     22     23      24     25     26     27     28     29     30      31     -------------------------------------------------                      1946, 4                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat              1      2      3      4      5      6       7      8      9     10     11     12     13      14     15     16     17     18     19     20      21     22     23     24     25     26     27      28     29     30     -------------------------------------------------                      1946, 5                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat                            1      2      3      4       5      6      7      8      9     10     11      12     13     14     15     16     17     18      19     20     21     22     23     24     25      26     27     28     29     30     31     -------------------------------------------------                      1946, 6                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat                                                 1       2      3      4      5      6      7      8       9     10     11     12     13     14     15      16     17     18     19     20     21     22      23     24     25     26     27     28     29      30     -------------------------------------------------                      1946, 7                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat              1      2      3      4      5      6       7      8      9     10     11     12     13      14     15     16     17     18     19     20      21     22     23     24     25     26     27      28     29     30     31     -------------------------------------------------                      1946, 8                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat                                   1      2      3       4      5      6      7      8      9     10      11     12     13     14     15     16     17      18     19     20     21     22     23     24      25     26     27     28     29     30     31       -------------------------------------------------                      1946, 9                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat       1      2      3      4      5      6      7       8      9     10     11     12     13     14      15     16     17     18     19     20     21      22     23     24     25     26     27     28      29     30     -------------------------------------------------                      1946, 10                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat                     1      2      3      4      5       6      7      8      9     10     11     12      13     14     15     16     17     18     19      20     21     22     23     24     25     26      27     28     29     30     31     -------------------------------------------------                      1946, 11                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat                                          1      2       3      4      5      6      7      8      9      10     11     12     13     14     15     16      17     18     19     20     21     22     23      24     25     26     27     28     29     30       -------------------------------------------------                      1946, 12                      -------------------------------------------------     Sun    Mon    Jue    Wed    Thu    Fri    Sat       1      2      3      4      5      6      7       8      9     10     11     12     13     14      15     16     17     18     19     20     21      22     23     24     25     26     27     28      29     30     31

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