c++比较日期如何做
要求这样
起始日期<当前日期 结束日期>当前日期
返回bool值就行
c++确实不懂
[解决办法]
COleDateTime Relational Operators
BOOL operator ==( const COleDateTime& date ) const;
BOOL operator !=( const COleDateTime& date ) const;
BOOL operator <( const COleDateTime& date ) const;
BOOL operator >( const COleDateTime& date ) const;
BOOL operator <=( const COleDateTime& date ) const;
BOOL operator >=( const COleDateTime& date ) const;
Remarks
These operators compare two date/time values and return nonzero if the condition is true; otherwise 0.
Note The return value of the ordering operations (<, <=, >, >=) is undefined if the status of either operand is null or invalid. The equality operators (==, !=) consider the status of the operands.
Example
COleDateTime dateOne(95, 3, 15, 12, 0, 0); // 15 March 1995 12 noon
COleDateTime dateTwo(dateOne); // 15 March 1995 12 noon
BOOL b;
b = dateOne == dateTwo; // TRUE
dateTwo.SetStatus(COleDateTime::invalid);
b = dateOne == dateTwo; // FALSE, different status
b = dateOne != dateTwo; // TRUE, different status
b = dateOne < dateTwo; // FALSE, same value
b = dateOne > dateTwo; // FALSE, same value
b = dateOne <= dateTwo; // TRUE, same value
b = dateOne >= dateTwo; // TRUE, same value
Note The last four lines of the preceding example will ASSERT in debug mode.
COleDateTime Overview | Class Members | Hierarchy Chart
See Also COleDateTime::GetStatus
