C++控制台日历

初次接触C++写的，也算是编程的起点吧~

#include <iostream>
#include <iomanip>

using namespace std;

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

int firstDayOfYear(int year)
{
    long n;
    int i=1;
    n=year*365;
    for(i=1;i<year;i++){
         if(leapYear(i))n+=1;
    }
    return n%=7;
}

int main()
{
    int year;
    int month[]={31,28,31,30,31,30,31,31,30,31,30,31};
    char week[]="Sun Mon Tue Wed Thu Fri Sat";
    cout<<"Input the year you want:";
    cin>>year;
    if(leapYear(year))
    {
      month[1]=29;

     }
    else
    {
    month[1]=28;0
    }
    int a,b,c,d,e;
    a=firstDayOfYear(year);
    e=a;
    int calendar[12][6][7];
    int i,j,k;
    for(i=0;i<12;i++)
    {
        for(j=0;j<6;j++)
        {
             for(k=0;k<7;k++)
             {
                 calendar[i][j][k]=0;
             }
         }
    }
    for(d=0,b=0;d-12<0;e=(e+month[d])%7,d++){
         for(c=1,b=0;month[d]-c>=0;c++)
         {
              if((e+c-1)%7==0)
              {
                  b++;
              }
              calendar[d][b][(e+c-2)%7]=c-1;
         }
    }
    for(i=0;i<6;i++)
    {
        for(int j=0;j<2;j++)
        {
            cout<<setw(3)<<week<< "  ";
        }
        cout<<endl;
        for(int k=0;k<6;k++)
        {
            for(int j=0;j<2;j++)
            {
                 for(int l=0;l<7;l++)
                 {
                     if(calendar[i*2+j][k][l]==0)
                     {
                        cout<<"    ";
                     }
                     else
                     {
                        cout<<setw(3)<<calendar[i*2+j][k][l]<<" ";
                     }
                 }
                 cout<<" ";
            }
            cout<<endl;
        }
        cout<<endl;
    } 
    return 0;
}