time_t doing not what i expect

what im trying to do is store the time & date into a string..

Code:

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string timeformat;
time_t x;
tm * time_;
time(&x); // get current time_t value
time_ = localtime(&x);
cout << time_->tm_mday << endl;    //here it prints out the right thing..

timeformat = time_->tm_mday; 
// here it doesnt do what i want it to do. here timeformat = "";

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??

Use strftime() to format time as a string

that function returns a size_t ??
whats that ?

Code:

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function prototype

size_t strftime(char *s, size_t max, const char *format, const struct tm *tm);

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hrm how do you actually use this function

I thought actually reading the manual would be a start

Code:

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char formattedtime[100];
strftime( formattedtime, sizeof formattedtime, "%H:%M:%S", time_ );
// now put it in a C++ string
timeformat = formattedtime;

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Quote:

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that function returns a size_t ??
whats that ?

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size_t is essentially an unsigned integer. It's defined in <cstddef>.

This is from the C-language standard (note the old-style dot-h header):

Quote:

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7.17 Common definitions <stddef.h>
1 The following types and macros are defined in the standard header <stddef.h>....

size_t
which is the unsigned integer type of the result of the sizeof operator...

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This is from dinkumware.com:

Quote:

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size_t

typedef ui-type size_t;

The type is the unsigned integer type ui-type of an object that you declare to store the result of the sizeof operator.

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