pr11006.cpp

来自「c++编程宝典源码及Quincy99编译器 是《标准C++编程宝典》电子工业出」· C++ 代码 · 共 47 行

////////////////////////////////////////
// File Name: pr11006.cpp
////////////////////////////////////////
#include <iostream>

////////////////////////////////////////
// Declare the Date class.
////////////////////////////////////////
class Date
{
    int mo, da, yr;

public:
    Date(int m, int d, int y) { mo = m; da = d; yr = y; }
    operator long();    // member conversion function.
};

////////////////////////////////////////
// Define the Date class.
////////////////////////////////////////

// The member conversion function.
Date::operator long()
{
    static int dys[]={31,28,31,30,31,30,31,31,30,31,30,31};
    long days = yr - 1900;
    days *= 365;
    days += yr / 4;
    for (int i = 0; i < mo-1; i++)
        days += dys[i];
    days += da;

    return days;
}

////////////////////////////////////////
// The main() function.
////////////////////////////////////////
int main()
{
    Date xmas(12, 25, 1997);
    long since = xmas;
    std::cout << since << std::endl;

    return 0;
}