书上没说清楚，求指教错误

文件1
# include<iostream.h>
# include"tdate.h"

void main()
{
    Tdate s;
    s.Set(12/9/2011);
    someFunc(&s);
}
void someFunc(Tdate * pS)
{
    pS->Print();
    if (pS->IsLeapYear())
        cout<<"ohoh\n";
    else
        cout<<"right\n";
}
文件2
# include<iostream.h>
class Tdate
{
public:
    void Set(int m,int d,int y)
    {
        month=m;
        day=d;
        year=y;
    }
    int IsLeapYear()
    {
        return (year%4==0&&year%100!=0)||(year%400==0);
    }
    void Print()
    {
        cout<<month<<"/"<<day<<"/"<<year<<"\n";
    }
private:
    int month;
    int day;
    int year;
};   
错误提示：
C:\Users\Administrator\Desktop\ｃ＋＋\2.cpp(2) : fatal error C1083: Cannot open include file: 'tdate.h': No such file or directory