What am I doing wrong with struct tm?

MGrancey · 11-22-2008, 03:27 PM

I have look around and around, and now matter what I seem to do I just can't seem to get this to work. I don't understand what I'm doing wrong. I've tried it with 'struct' in front of 'tm *today' as well

When I debug it, I get "Error 2 error C2228: left of '.tm_mon' must have class/struct/union". Which I don't get since I thought I had declared it.

Code:

#include <stdio.h>
#include <iostream>
#include <ctime>

using namespace std;

int main ()
{

	char test;
	time_t now;
	tm *today;

	time(&now);
	today=localtime(&now);

	cout << today.tm_mon << endl;

	cout << "Did it work?";
	cin >> test;

  return 0;
}

What am I doing wrong?

**Salem** · 11-22-2008, 03:30 PM

It's a pointer to a struct.

So it's
today->tm_mon;

**laserlight** · 11-22-2008, 03:31 PM

Since today is a pointer, it should be today->tm_mon.

MGrancey · 11-22-2008, 08:36 PM

Thanks, that was a silly thing to miss when I read that several times.

11-22-2008, 03:27 PM	#1
MGrancey Registered User Join Date: Oct 2008 Posts: 7	What am I doing wrong with struct tm? I have look around and around, and now matter what I seem to do I just can't seem to get this to work. I don't understand what I'm doing wrong. I've tried it with 'struct' in front of 'tm today' as well When I debug it, I get "Error 2 error C2228: left of '.tm_mon' must have class/struct/union". Which I don't get since I thought I had declared it. Code: #include <stdio.h> #include <iostream> #include <ctime> using namespace std; int main () { char test; time_t now; tm today; time(&now); today=localtime(&now); cout << today.tm_mon << endl; cout << "Did it work?"; cin >> test; return 0; } What am I doing wrong?
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11-22-2008, 03:30 PM	#2
Salem and the hat of vanishing Join Date: Aug 2001 Location: The edge of the known universe Posts: 21,214	It's a pointer to a struct. So it's today->tm_mon; __________________ If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut. Up to 8Mb PlusNet broadband from only £5.99 a month!
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11-22-2008, 03:31 PM	#3
laserlight C++ Witch Join Date: Oct 2003 Location: Singapore Posts: 10,354	Since today is a pointer, it should be today->tm_mon. __________________ C + C++ Compiler: MinGW port of GCC Build + Version Control System: SCons + Bazaar Look up a C/C++ Reference and learn How To Ask Questions The Smart Way
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11-22-2008, 08:36 PM	#4
MGrancey Registered User Join Date: Oct 2008 Posts: 7	Thanks Thanks, that was a silly thing to miss when I read that several times.
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