chengxu.txt

万年历功能的实现 求某个日期对应的星期 求某年某月有的天数 输出某年的日历.

   mon = 2*i + j;
   week = WeekDay(year, mon, 1);//根据输入的日期，返回对应的星期
   printf("%*d   ", week*5+2, month[mon].data++); //控制输出格式，把每月的1日打印在对应星期的下面 
   week++;
   while(week < 7) //接着在该行打印该周剩余的日期 
   {
    printf("%2d   ", month[mon].data++);
    week++;
   }
   if(j==1)
    printf("\t");
  }
  printf("\n");   printf("\n");//从第4行起打印该月剩余的日期，每7个一行；直至该月日期打印完毕 
  while(month[2*i+1].data<=month[2*i+1].maxdata || month[2*i+2].data<=month[2*i+2].maxdata) 
  {
   for(j=1; j<=2; j++)
   {
    mon = 2*i + j;
    for(k=0; k<7; k++)
    {  //如果该月日期未打印完，打印该日期 
     if(month[mon].data<=month[mon].maxdata)
      printf("%2d   ", month[mon].data++);
     else  //否则输出空格 
      printf("     ");
    }
    if(j==1)
    printf("\t");
   }
   printf("\n"); printf("\n");
  }
  printf("\n"); 
 }
}


二,打印版(:即既能输出到屏幕,又可输出到文件)

/*万年历全集：程序可以实现如下三种功能：
求某个日期对应的星期
求某年某月有的天数 
输出某年的日历
*/
/*2006-1-2   梁见斌*/
＃i nclude
＃i nclude

struct mon
{
 int maxdata;
 int data;
};

void SeekWeekDay(void); //求某个日期对应的星期函数 
int WeekDay(int year, int month, int day); //根据输入的日期，返回对应的星期
void HowManyDays(void);//求某年某月有的天数函数 
int MonthDays(int year, int month);//根据输入的年号和月份，返回该月的天数    
void PrintWeek(int weekday, FILE *fp);//打印星期几 
void PrintMonth(int month, FILE *fp); //打印月份 
void PrintData(); //打印日历 

int main(void)
{
 int choice;
 
 while(1)
 {
   puts("------------------------------------------");
   puts("请输入您的选择：");
   puts("输入1求某个日期对应的星期");
   puts("输入2求某年某月有的天数");
   puts("输入3输出某年的日历");
   puts("输入4结束程序");
   puts("------------------------------------------");
  scanf("%d", &choice); fflush(stdin);
  switch(choice)
  {
   case 1: SeekWeekDay();  break;
   case 2: HowManyDays();  break;
   case 3: PrintData();  break;
   case 4: return 0;
   default: puts("输入错误，请重新输入"); break;
  }
  printf("\n");   printf("\n");
 }
  system("pause");
  return 0;
} 
void HowManyDays(void) //求某年某月有的天数函数
{
 int year, month, days;
 
 puts("请输入年号和月份：");
 scanf("%d%d", &year, &month); fflush(stdin);
 printf("你的输入为 %d年%d月，", year, month);
 days = MonthDays(year, month); //根据输入的年号和月份，返回该月的天数    
 printf(" %d年%d月有%d天\n", year, month, days);
}
void SeekWeekDay(void) //求某个日期对应的星期函数  
{
 FILE *fp;
 int year, month, day, weekday;
 
 if ( (fp=fopen("wnlweek.txt","w+")) == NULL)
  {
    fprintf(stderr,"\nError opening file\n");
   exit(1);
  } 
 puts("请输入年，月， 日：");
 scanf("%d%d%d", &year, &month, &day); fflush(stdin);
 printf("你的输入为 %d年%d月%d日\n", year, month, day);
 weekday = WeekDay(year, month, day); //根据输入的日期，返回对应的星期
 printf("这天是 ");
 PrintWeek(weekday, fp); //打印星期几 
}
void PrintWeek(int weekday, FILE *fp)//打印星期几 
{
 switch(weekday)
 {
  case 0 : fprintf(stdout, "%s","周日 "); fprintf(fp, "%s","周日 "); break;
  case 1 : fprintf(stdout, "%s","周一 "); fprintf(fp, "%s","周一 ");break;
  case 2 : fprintf(stdout, "%s","周二 "); fprintf(fp, "%s","周二 ");break;
  case 3 : fprintf(stdout, "%s","周三 "); fprintf(fp, "%s","周三 ");break;
  case 4 : fprintf(stdout, "%s","周四 "); fprintf(fp, "%s","周四 "); break;
  case 5 : fprintf(stdout, "%s","周五 "); fprintf(fp, "%s","周五 ");break;
  case 6 : fprintf(stdout, "%s","周六 "); fprintf(fp, "%s","周六 ");break;
 }
}
void PrintMonth(int month, FILE *fp)  //打印月份
{
 switch(month)
 {
  case 1 : fprintf(stdout, "%s","一   月 "); fprintf(fp, "%s","一   月 ");break;
  case 2 : fprintf(stdout, "%s","二   月 "); fprintf(fp, "%s","二   月 ");break;
  case 3 : fprintf(stdout, "%s","三   月 "); fprintf(fp, "%s","三   月 ");break;
  case 4 : fprintf(stdout, "%s","四   月 "); fprintf(fp, "%s","四   月 ");break;
  case 5 : fprintf(stdout, "%s","五   月 "); fprintf(fp, "%s","五   月 ");break;
  case 6 : fprintf(stdout, "%s","六   月 "); fprintf(fp, "%s","六   月 ");break; 
  case 7 : fprintf(stdout, "%s","七   月 "); fprintf(fp, "%s","七   月 ");break;
  case 8 : fprintf(stdout, "%s","八   月 "); fprintf(fp, "%s","八   月 ");break;
  case 9 : fprintf(stdout, "%s","九   月 "); fprintf(fp, "%s","九   月 ");break;
  case 10: fprintf(stdout, "%s","十   月 "); fprintf(fp, "%s","十   月 ");break;
  case 11: fprintf(stdout, "%s","十一 月 "); fprintf(fp, "%s","十一 月 ");  break;
  case 12: fprintf(stdout, "%s","十二 月 "); fprintf(fp, "%s","十二 月 ");  break;
 }
}
int WeekDay(int year, int month, int day)  //根据输入的日期，返回对应的星期
{
 int i;
 int run=0, ping=0;
 long sum;
 
 for(i=1; i {
  if(i%4==0 && i%100!=0 || i%400==0)
   run++;
  else
   ping++;
 }
 sum = 366*run + 365*ping;
 for(i=1; i  sum += MonthDays(year, i);
 sum += day;   //计算总天数 
 return (int)sum%7;
}
int MonthDays(int year, int month)//根据输入的年号和月份，返回该月的天数    
{
 switch(month)
 {
  case 1:
  case 3:
  case 5:
  case 7:
  case 8:
  case 10:
  case 12:  return 31;
  case 4:
  case 6:
  case 9:
  case 11:  return 30;
  case 2:   if(year%4==0 && year%100!=0 || year%400==0)
        return 29; 
       else
        return 28;
  default: puts("这是一个错误的月份！"); system("pause"); return 0;  
 }
}

void PrintData(void)//打印日历，对输出格式的控制较复杂
{
 FILE *fp;
 struct mon month[13];
 int i, j, k;
 int year, mon, week;
 
 if ( (fp=fopen("wnldata.txt","w+")) == NULL)
  {
    fprintf(stderr,"\nError opening file\n");
   exit(1);
  } 
 puts("请输入年号:");
 scanf("%d", &year);
 fprintf(stdout, "--------------------------------------------------------------------------\n");
 fprintf(fp, "--------------------------------------------------------------------------\n");
 fprintf(stdout, "%35d %s\n", year, "年"); fprintf(fp, "%35d %s\n", year,"年"); 
 fprintf(stdout, "--------------------------------------------------------------------------\n");
 fprintf(fp, "--------------------------------------------------------------------------\n");
 for(i=1; i<13; i++) //存储该年每个月的总天数和初始日期 
 {
  month[i].data = 1;
  month[i].maxdata = MonthDays(year, i);
 }
 
 for(i=0; i<6; i++) //总共输出6排 
 {
  for(j=1; j<=2; j++)//每排输出2个月 
  {
   mon = 2*i + j;
   fprintf(stdout, "%15s", " ");  fprintf(fp, "%15s", " ");
   PrintMonth(mon, fp);  //第一行打印月份 
   fprintf(stdout, "%15s", " ");  fprintf(fp, "%15s", " ");
   if(j==1)
   { fprintf(stdout, "\t");     fprintf(fp, "\t"); }
  }
  fprintf(stdout, "\n");  fprintf(stdout, "\n");  fprintf(fp, "\n");  fprintf(fp, "\n");
  for(j=1; j<=2; j++)
  {
   for(k=0; k<7; k++)
   {
     PrintWeek(k, fp);    //第2行打印星期 
   }
   fprintf(stdout, "\t");   fprintf(fp, "\t");
  }
  printf("\n");    fprintf(fp, "\n");
  for(j=1; j<=2; j++)
  {
   mon = 2*i + j;
   week = WeekDay(year, mon, 1);   //根据输入的日期，返回对应的星期
   //控制输出格式，把每月的1日打印在对应星期的下面 
   fprintf(stdout, "%*d   ", week*5+2, month[mon].data);  fprintf(fp, "%*d   ", week*5+2, month[mon].data);
   month[mon].data++;
   week++;
   while(week < 7) //接着在该行打印该周剩余的日期 
   {
    fprintf(stdout, "%2d   ", month[mon].data++);  fprintf(fp, "%2d   ", month[mon].data++);
    week++;
   }
   if(j==1)
   { fprintf(stdout, "\t");   fprintf(fp, "\t"); }
  }
  fprintf(stdout, "\n");  fprintf(stdout, "\n");   fprintf(fp, "\n");   fprintf(fp, "\n");
  //从第4行起打印该月剩余的日期，每7个一行；直至该月日期打印完毕 
  while(month[2*i+1].data<=month[2*i+1].maxdata || month[2*i+2].data<=month[2*i+2].maxdata) 
  {
   for(j=1; j<=2; j++)
   {
    mon = 2*i + j;
    for(k=0; k<7; k++)
    {
     if(month[mon].data<=month[mon].maxdata)
     {  //如果该月日期未打印完，打印该日期 
      fprintf(stdout, "%2d   ", month[mon].data);  
      fprintf(fp, "%2d   ", month[mon].data); 
      month[mon].data++;
     }
     else    //否则输出空格 
     { fprintf(stdout, "     ");     fprintf(fp,"     "); }
    }
    if(j==1)
    { fprintf(stdout, "\t");   fprintf(fp, "\t");  }
   }
   fprintf(stdout, "\n"); fprintf(stdout, "\n");   fprintf(fp, "\n"); fprintf(fp, "\n");
  }
  fprintf(stdout, "\n");  fprintf(fp, "\n"); 
 }
 fclose(fp);
}