how do i write the date into a c++ code?

Question

I want to give the file I open the current date in it's name. I allready insert some parameters into the file's name with sprintf command. example:

char filename1[64];
sprintf(filename1,"The_file_name_%g.dat",parameter1);

but how do I get it to write the date(preferebly 4 digits)?

I don't use windows, but Linux

Answer 1

you can do that using time.h file

includ time.h in ur cpp file

check this reference for time.h
http://www.cplusplus.com/ref/ctime/localtime.html

thanx

Answer 2

sorry i dont know about c++ but why dont you do something like this in the shell script

field =date
filename=$filename_${field}

this will append the date with the filename you created with c++

hope it helps

Answer 3

You can use SYSTEMTIME if you want to get at each time attribute...

SYSTEMTIME st;
GetSystemTime(&st);

Then you can access it's members:
WORD wYear;
WORD wMonth;
WORD wDayOfWeek;
WORD wDay;
WORD wHour;
WORD wMinute;
WORD wSecond;
WORD wMilliseconds;

i.e. st.wHour ...

You must include to use it