c语言编写日历作业 C实例编程(用C语言编写的一个日历文件)

#includetypedef strUCt

{

unsigned char day;

unsigned char month;

unsigned short year;

}T_MFW_DATE;

typedef struct

{

T_MFW_DATE date; /*记录的日期*/

}t_cldrecord;

typedef struct

{

T_MFW_DATE today_date; /*在程序中没有作用*/

T_MFW_DATE cursor_date;

int days_map[6][7]; /*日期地图*/

}t_cldmain_data;

t_cldmain_data *cldmain_data;

void cldmain_get_days_map(void);

void main(void)

{

int i,j;

cldmain_data = (t_cldmain_data*)malloc(sizeof(t_cldmain_data));

cldmain_data->cursor_date.day = 20;

while(1)

{

char buf[20];

char *p;

memset(buf,0,20);

printf("year month:");

gets(buf);

if(buf[0] == 'q')break;

cldmain_data->cursor_date.year = strtod(buf,&p);

p ++;

cldmain_data->cursor_date.month = strtod(p,&p);

printf("year %d month %d ",(cldmain_data->cursor_date.year),(cldmain_data->cursor_date.month));

cldmain_get_days_map();

printf(" mo tu w th fr sa su ");

for(j = 0; j < 6; j ++)

{

printf(" ");

for(i = 0; i < 7; i ++)

{

printf("%i ",cldmain_data->days_map[j][i]);

}

printf(" ");

}

}

//getchar();

}

/*

检查日期是否合法

合法返回1，考试.大提示否则返回0

*/

int check_date(T_MFW_DATE date)

{

char month_days[] = ;

/*大于2000年，小于2100年,月份合法*/

if(date.year < 2000 date.year >= 2100 date.month < 1 date.month > 12)

{

return 0;

}

/*day合法*/

if(date.day < 1)return 0;

if(date.day > month_days[date.month - 1])return 0;

if(date.month == 2)

{

if(date.year % 4 != 0)

{

if(date.day == 29)return 0;

}

}

return 1;

}

/*

功能：得到每个月第一天是星期几

星期 一 二 三 四 五 六 日

返回值：1 2 3 4 5 6 7

如果返回为0，则出错

*/

int get_weekday_of_month(T_MFW_DATE cursor_date)

{

int day;

/*参照1997年1月1日,参数cursor_date从2000年1月1日到2099年1月1日*/

//char month_days[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int this_year_days[] ={ 0, 31, 59, 90, 120, 151,181, 212, 243, 273, 304, 334};

int cursor_year_days = this_year_days[cursor_date.month - 1] + (cursor_date.day = 1);

int comp_days = (cursor_date.year - 1997)*365 + cursor_year_days;

int i = (cursor_date.year - 1997)/4;

comp_days = comp_days + i * 1;

if(cursor_date.month > 2)

{

if( cursor_date.year % 4 == 0 )

{

comp_days += 1;

}

}

if(cursor_date.day > 2098)return 0;

day = comp_days % 7;

/*1997年1月1日是星期三*/

day = (day + 2) % 7;

if(day == 0)day = 7;

return day;

}

/*

根据参数的值,得到该年该月有多少天.

返回值:该月的天数

*/

int count_days_of_month(T_MFW_DATE cursor_date)

{

char month_days[] = ;

unsigned char day = cldmain_data->cursor_date.day;

unsigned char month = cldmain_data->cursor_date.month;

unsigned short year = cldmain_data->cursor_date.year;

if(month != 2)

{

return month_days[month -1];

}

else

{

if(year%4 != 0)

{

return 28;

}

if(year%4 == 0)

{

if(year%100 == 0)

{

if(year %400 == 0)

{

return 29;

}

return 28;

}

return 29;

}

}

}

/*

得到日期地图,保存到全局结构变量cldmain_data的成员数组变量days_map中.

*/

void cldmain_get_days_map(void)

{

int i;

int day;

T_MFW_DATE cursor_date = cldmain_data->cursor_date;

int *map_p = cldmain_data->days_map[0];

int days_count;

int weekday;

for(i = 0; i < 6*7; i++)

{

map_p[i] = 0;

}

if(check_date(cldmain_data->cursor_date) == 0)return;

days_count = count_days_of_month(cldmain_data->cursor_date);

weekday = get_weekday_of_month(cldmain_data->cursor_date);

day = 1;

for(i = weekday-1; i < days_count + weekday - 1; i++)

{

map_p[i] = day;

day ++;

}

}