本文实例为大家分享了C++实现万年历的具体代码，供大家参考，具体内容如下
#include<iostream>
#include<string>
#include<fstream>
#include<iomanip>
using namespace std;
#include<time.h>
ofstream fout("日历.txt");
void Printtitle(int n);
int OrEndl(int n);
string Choose(); //选择功能
int Calculate(int mon,int day);
void Printday(int a);
void FirstDay(int wday);
void SomeYear(int p);
void ThisMonth(); //打印当月日历的主函数
void PrintFirstNum(int mon);
void Printyear(int year);
void ThisYear(int p); //打印当年日历的主函数
void Month(int n);
void Printnum(int q,int mon);
int Firstwday[12]; //储存每个月1号的星期数
struct tm *local;
string ch;
int a[12]={31,28,31,30,31,30,31,31,30,31,30,31}; //储存每月的天数
int main(void)
{
long t;
time(&t);
local=localtime(&t);
local->tm_year=local->tm_year+1900;
local->tm_mon++;
cout<<"今天是："<<local->tm_year<<"年"<<local->tm_mon
<<"月"<<local->tm_mday<<"日，";
fout<<"今天是："<<local->tm_year<<"年"<<local->tm_mon
<<"月"<<local->tm_mday<<"日，";
Month(local->tm_wday);
cout<<endl;
fout<<endl;
cout<<"当前时间是："<<local->tm_hour<<"时"<<local->tm_min<<"分"<<local->tm_sec
<<"秒"<<local->tm_wday<<endl;
fout<<"当前时间是："<<local->tm_hour<<"时"<<local->tm_min<<"分"<<local->tm_sec
<<"秒"<<local->tm_wday<<endl;
string flag;
int sum;
if(((local->tm_year%4==0)&&(local->tm_year%100!=0))||(local->tm_year%400==0))
a[1]=29;
sum=Calculate(local->tm_mon,local->tm_mday);
int p=sum-(local->tm_wday+1)-(sum/7)*7;
do{
flag=Choose();
if(flag=="1") //根据选择的数字确定调用哪个函数
ThisMonth();
else if(flag=="2")
ThisYear(p);
else if(flag=="3")
SomeYear(p);
else if(flag=="4")
break;
else
{
cout<<"输入错误"<<endl;
fout<<"输入错误"<<endl;
continue;
}
}while(1);
return 0;
}
string Choose()
{
cout<<"请选择"<<"1、当月日历"<<endl<<" 2、当年日历"<<endl
<<" 3、万年历"<<endl<<" 4、退出"<<endl;
fout<<"请选择"<<"1、当月日历"<<endl<<" 2、当年日历"<<endl
<<" 3、万年历"<<endl<<" 4、退出"<<endl;
cin>>ch;
fout<<ch;
cout<<endl;
fout<<endl;
return ch;
}
void ThisMonth()
{
int m=local->tm_mon%12;
Printtitle(m);
int p=local->tm_mday-(local->tm_wday+1)-(local->tm_mday/7)*7;
Printnum(p,local->tm_mon);
}
void ThisYear(int p)
{
FirstDay(p);
Printyear(local->tm_year);
for(int a=1;a<12;a=a+2)
{
Printtitle(a);
PrintFirstNum(a);
}
}
void SomeYear(int p) //打印万年历的主函数
{
int m;
cout<<"Please enter a year number"<<endl;
fout<<"Please enter a year number"<<endl;
while(1)
{
scanf("%d",&m);
if( m<0 )
{
printf("\nInput error,Please enter a year number again:\n");
fflush(stdin); //没加这句话会死循环，加了就ok
}
else break;
}
fout<<m;
cout<<endl;
fout<<endl;
Printyear(m);
int n=m;
if(n<local->tm_year) //计算所输年份的1月1日星期几
{
for(;n<local->tm_year;n++)
{
if(((n%4==0)&&(n%100!=0))||(n%400==0))
p=p+2;
else
p++;
if(p>=7)
p=p-7;
}
}
else
{
for(;n>local->tm_year;n--)
{
if(((n%4==0)&&(n%100!=0))||(n%400==0))
p=p-2;
else
p--;
if(p<0)
p=p+7;
}
}
FirstDay(p);
for(int h=1;h<12;h=h+2)
{
Printtitle(h);
if(((m%4==0)&&(m%100!=0))||(m%400==0))
a[1]=29;
else
a[1]=28;
PrintFirstNum(h);
}
}
void Printtitle(int n) //打印标题
{
do{
cout<<" ";
fout<<" ";
char str[12][10]={"January","February","March","April","May","June","July","August","September","October","November","December"};
for(int h=0;h<10;h++)
{
cout<<str[n-1][h];
fout<<str[n-1][h];
}
cout<<" ";
fout<<" ";
if(OrEndl(n))
break;
n++;
}while(!(n%2));
do{
cout<<"____________________________";
fout<<"____________________________";
if(OrEndl(n))
break;
n++;
}while(!(n%2));
do{
cout<<" Sun Mon Tue Wed Thu Fri Sat ";
fout<<" Sun Mon Tue Wed Thu Fri Sat ";
if(OrEndl(n))
break;
n++;
}while(!(n%2));
}
int Calculate(int mon,int day) //计算当天到当年1月1日的天数
{
int sum=day;
for(mon--;mon!=0;mon--)
sum=sum+a[mon-1];
return sum;
}
void FirstDay(int wday) //推算每个月1号的星期数
{
if(wday<=0)
wday=wday+7;
Firstwday[0]=7-wday;
for(int n=0;n<11;n++)
{
Firstwday[n+1]= Firstwday[n]+a[n]%7;
if(Firstwday[n+1]>6)
Firstwday[n+1]=Firstwday[n+1]-7;
}
}
int OrEndl(int n)
{
if(ch=="1") //如果是打出当月日历就直接跳出循环
{
cout<<endl;
fout<<endl;
return 1;
}
if(n%2) //判断单月输空格，双月回车
{
cout<<" ";
fout<<" ";
}
else
{
cout<<endl;
fout<<endl;
}
return 0;
}
void Printyear(int year) //打印年份
{
int m=year/1000;
int n=(year/100)%10;
int p=(year/10)%10;
int q=year%10;
int num[4]={m,n,p,q};
char str[5][10][7]={"***** "," * ","***** ","***** ","* * ","***** ","***** ","***** ","***** ","***** ",
"* * "," * "," * "," * ","* * ","* ","* "," * ","* * ","* * ",
"* * "," * ","***** ","***** ","***** ","***** ","***** "," * ","***** ","***** ",
"* * "," * ","* "," * "," * "," * ","* * "," * ","* * "," * ",
"***** "," * ","***** ","***** "," * ","***** ","***** "," * ","***** ","***** ",};
for(int g=0;g<5;g++)
{
cout<<" ";
fout<<" ";
for(int i=0;i<4;i++)
for(int h=0;h<7;h++)
{
cout<<str[g][num[i]][h];
fout<<str[g][num[i]][h];
}
cout<<endl;
fout<<endl;
}
}
void PrintFirstNum(int mon) //打印每两个月的日历
{
int mday[2]; //储存每两个月当前打印的日期
do{
int k=0;
for(;k<Firstwday[mon-1];k++)
{ cout<<" ";
fout<<" ";
}
k++;
for(int d=1;k<8;d++,k++) //输入每个月的第一行
{
cout<<" "<<d<<" ";
fout<<" "<<d<<" ";
}
if(mon%2) //判断单月输空格，双月回车
{
cout<<" ";
fout<<" ";
mday[mon%2-1]=d;
}
else
{
cout<<endl;
fout<<endl;
mday[mon%2+1]=d-1;
}
mon++;
}while(!(mon%2));
mon=mon-2;
int i=0,k=1,m=mon-1;
for(;mday[i]<a[m]+1;mday[i]++,k++)
{
if(mday[i]<10)
{
cout<<" "<<mday[i]<<" ";
fout<<" "<<mday[i]<<" ";
}
else
{
cout<<" "<<mday[i]<<" ";
fout<<" "<<mday[i]<<" ";
}
if(k==7)
{
if(!i)
{
cout<<" ";
fout<<" ";
i=1;
m++;
}
else
{
cout<<endl;
fout<<endl;
i=0;
m--;
}
k=0;
}
}
m=mon-1;
if(mday[0]==a[m]+1&&mday[1]<a[m+1]+1) //当双月未结束，单月输入结束跳出时最后一行的输出情况
{
for(;k<8;k++)
{
cout<<" ";
fout<<" ";
}
cout<<" ";
fout<<" ";
k=1;
for(mday[1]++;mday[1]<a[m+1]+1;mday[1]++,k++)
{
cout<<" "<<mday[1]<<" ";
fout<<" "<<mday[1]<<" ";
if(k==7)
{
cout<<endl;
fout<<endl;
cout<<" ";
fout<<" ";
}
}
cout<<endl;
fout<<endl;
}
if(mday[0]<a[m]+1&&mday[1]==a[m+1]+1) //当单月未结束，双月输入结束跳出时最后一行的输出情况
{
cout<<endl;
fout<<endl;
k=1;
for(mday[0]++;mday[0]<a[m]+1;mday[0]++,k++)
{
cout<<" "<<mday[0]<<" ";
fout<<" "<<mday[0]<<" ";
if(k==7)
{
cout<<endl;
fout<<endl;
cout<<" ";
fout<<" ";
}
}
cout<<endl;
fout<<endl;
}
}
void Month(int n)
{
char str[7][7]={"星期天","星期一","星期二","星期三","星期四","星期五","星期六"};
for(int h=0;h<7;h++)
{
cout<<str[n][h];
fout<<str[n][h];
}
}
void Printnum(int q,int mon) //打印当月日历
{
if(q<0)
q=q+7;
int k=0;
if(q!=7&&q)
{
for(;k<7-q;k++)
{
cout<<" ";
fout<<" ";
}
}
k++;
for(int d=1;d<a[mon-1]+1;d++,k++)
{
cout<<setw(4)<<d;
if(k==7)
{
cout<<endl;
fout<<endl;
k=0;
}
}
cout<<endl;
fout<<endl;
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持呐喊教程。
声明：本文内容来源于网络，版权归原作者所有，内容由互联网用户自发贡献自行上传，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任。如果您发现有涉嫌版权的内容，欢迎发送邮件至：notice#nhooo.com（发邮件时，请将#更换为@）进行举报，并提供相关证据，一经查实，本站将立刻删除涉嫌侵权内容。