qdate-helpers.h

QT4的utils库源码包.解压后运行./configure配置,然后make.使用时在.pro文件中加入两行:LIBS+=-L$$(CPPLIBS)-lutils及INCLUDEPATH+=$$(C

#ifndef _QDATE_HELPERS_H
#define _QDATE_HELPERS_H

#include <QDate>
#include <QTextStream>

/**
  These are global operator functions for QDate.
  This is how one can add interface to a class without
  actually modifying the class itself.
  */

QTextStream &operator>>(QTextStream& is, QDate& qd);
QTextStream &operator<<(QTextStream& os, const QDate& qd) ;
void cinReadDate(QDate& wd);

QDate& operator+=(QDate& qd, int numDays) ;
QDate operator+(const QDate& qd, int numDays);
int operator-(const QDate& qd1, const QDate& qd2);

#endif