满意答案

l7i3f

2013.04.21

采纳率：43%    等级：11

已帮助：7884人

#include

int day,year,month;

int isLeap()

{int isleap;

if(((year%4==0)&&!(year%100==0))||(year%400==0))isleap=1;

else isleap=0;

return isleap;}

int lastdayofmonth()

{int lastday,isleap;

switch (month)

{case 1: case 3: case 5: case 7:case 8: case 10: case 12: lastday=31;break;

case 4: case 6: case 9: case 11: lastday=30;break;

case 2: {isleap=isLeap();

if (isleap==1) lastday=29;

else lastday=28;}}

return lastday;}

int ValidDate()

{int valid;

int yearOK,monthOK,dayOK;

if ((year>1811)&&(year<=2012)) yearOK=1;

else yearOK=0;

if ((month>0)&&(month<=12)) monthOK=1;

else monthOK=0;

if ((day>0)&&(day<=lastdayofmonth())) dayOK=1;

else dayOK=0;

if(yearOK && monthOK && dayOK) valid=1;

else valid=0;

return valid;}

int getday(){printf("Enter a month/a day/a year");scanf("%d %d %d",&month,&day,&year);

return ValidDate();}

void incrementdate()

{if (day

else

{day=1;

if (month==12)

{month=1;year+=1;}

else month+=1;}}

void print()

if (ValidDate())printf("nextday is %d/%d/%d",month,day,year);elseprintf("Date error");}

void main(){getday();incrementdate();print();}

补充一下，又发现一个问题。输入之后虽然你做了输入检查，但是现在的写法，这个检查起不到任何作用。可以把main里的getday();改写成if(getday()==0){printf("Date error");return;}意思是如果输入的日期不正常的话打出出错信息并结束程序

主要功能包括

1.查询某年某月每一天对应星期几

2.可以查询某年某月的上个月或是下个月的日历情报

3.查询某年某月某日是这一年的第几天，并查询改天是星期几

4.判断该年是闰年还是平年，判断这一年的生肖

#include

#include

#include

void rili(int,int);

int runniansub(int);

int week(int,int,int);

int monthday[12]={31,28,31,30,31,30,31,31,30,31,30,31};

int main()

{ struct date d;

getdate(&d);

printf("今天是：%d年 %d月 %d日\n",d.da_year,d.da_mon,d.da_day);

rili(d.da_year,d.da_mon-1);

system("pause");

return 0; }

void rili(int year,int month)

{ int d,w,i,s,c,p;

char x;

while(month>11) {

month-=12;

year++; }

while(month<0) { year--;

month+=12; }

if(runniansub(year)) monthday[1]=29;

printf("%d年%d月\n",year,month+1);

printf("S M T W T F S\n");

s=week(year,month+1,1);

for(i=0; i<3*s; i++ ) printf(" ");

c=s;

for(d=1;d<=monthday[month];d++) {

if(c>6) {

printf("\n");

c=0; }

c++;

printf("%d",d);

printf("%s",(d<10)?" ":" "); }

printf("\n");

printf("下月N，上月P，退出Q");

x=getch();

printf("%c\n",x);

if(x=='N' || x=='n') { rili(year,month+1); }

else if(x=='P' || x=='p') { rili(year,month-1); }

else { printf("感谢使用！88\n"); return;} }

int runniansub(int year)

{ return ((year%4==0 && year%100!=0) || (year%4==0 && year%400==0)); }

int week(int y,int m,int d)

{ if((m==1)||(m==2)) {

m+=12;

y--; }

return ((d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)+1)%7;

#include

int IsLeapYear(int); /*定义子函数*/

main()

{int i,day,year,temp,temp_i; /*定义变量*/

long int Year_days=0;

int Year_Start=1;

int Per_Year_Days;

int month_day[]={31,28,31,30,31,30,31,31,30,31,30,31,29};/*定义

月份*/

printf("We know that 2000.01.01 is saturday!\n");

printf("Please enter the year and month:"); /*提示信息*/

while(1)

{scanf("%d %d",&year,&temp);

if(getchar()=='q')

exit(0);

while(Year_Start < year)

{ if(IsLeapYear(Year_Start)) /*调用IsLeapYear函数判断是否为

闰年*/

Per_Year_Days=366; /*闰年一年366天*/

else

Per_Year_Days=365; /*平年一年365天*/

Year_days=Year_days + Per_Year_Days;

Year_Start++;

} /*输出每个月的日历*/

// for(temp=1;temp<=12;temp++)

{switch(temp)

{ case 1: printf("January (%d) \n",year);break;

case 2: printf("February (%d) \n",year); break;

case 3: printf("March (%d) \n",year); break;

case 4: printf("April (%d) \n",year); break;

case 5: printf("May (%d) \n",year); break;

case 6: printf("June (%d) \n",year);break;

case 7: printf("July (%d) \n",year);break;

case 8: printf("Auguest (%d) \n",year); break;

case 9: printf("September (%d) \n",year);break;

case 10:printf("October (%d) \n",year);break;

case 11:printf("Novermber (%d) \n",year); break;

case 12:printf("December (%d) \n",year); break;

default:printf("error\n");

}

i=Year_days%7;

printf("Mon Tue Wed Thu Fri Sat Sun\n"); /*星期提示信息*/

if(i!=0)

for(temp_i=0;temp_i

printf(" ");

day=1;

if(IsLeapYear(year)&&temp==2)

while(day<=month_day[12])

{if(day>1)

if(Year_days%7==0)

printf("\n");

if(day>=10)

printf("%d ",day);

else

printf("%d ",day);

Year_days++;

day++;}

else

while(day<=month_day[temp-1])

{ if(day>1)

if(Year_days%7==0)

printf("\n");

if(day>=10)

printf("%d ",day);

else

printf("%d ",day);

Year_days++;

day++; } /*依次输入日期*/

printf("\n") ；}}}

int IsLeapYear(int year) /*判断是否是闰年*/

{ if((year%4==0)&&(year%100!=0)||(year%400==0))

return 1;

else

return 0;}}

#include

int leap (int year)

{if(year%4==0&&year%100!=0||year%400==0) //判断是否是闰年

return 1;

else return 0; }

int days_month (int month,int year) //判断大月和小月

{ if(month==1||month==3||month==5||month==7||month==8||month==10||month==12) //找出大月

return 31;

if(month==4||month==6||month==9||month==11) //找出小月

return 30;

if(month==2&&leap(year)==1) return 29; //判断二月是29天还是29天

else return 28; }

int firstday(int month,int year)

{int w;

w=(1+2*month+3*(month+1)/5+year+year/4+year/400-year/100)%7+1; //判断每个月开始的第一天是星期几

return w; }

main()

{int i,j=1,k=1,a,b,month,year;

printf("\n input month and year:\n");

scanf("%d%d",&month,&year); //输入月和年

b=days_month(month,year);

a=firstday (month,year);

printf(" Sun Mon Tue Wed Thu Fri Sat \n"); //输出对应当月的日历

if(a==7)

{for(i=1;i<=b;i++)

{printf("%4d",i);

if(i%7==0)

{printf("\n"); } } }

if(a!=7)

{while (j<=4*a)

{printf(" ");

j++; }

for(i=1;i<=b;i++)

{printf("%4d",i);

if(i==7*k-a)

{printf("\n");

k++; } } }

printf("\n"); }

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