DateTime field with C++

[Sylar rei]

HI Dear All;
i had a question with mysql in c++ code
there a field in my table that's type is datetime

now in my code
i connect to the database and access that table,
i wanna save time format in that's field,
but what kind of type i need to use?
int ? double? or .....

i get time use this code:

         time_t ntime;
	struct tm *today;
	char timestamp[100];
	time(&ntime);
	today=localtime(&ntime);

so get : 20080620102831
can anybody help me?
thanksQ

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