The setlocale(), strftime() and gmtime() C functions

Compiler: Visual C++ Express Edition 2005

Compiled on Platform: Windows XP Pro SP2

Target platform: none, just for learning

Header file: Standard and Windows

Additional library: Windows Platform SDK

Additional project setting: Set project to be compiled as C

Project -> your_project_name Properties -> Configuration Properties -> C/C++ -> Advanced -> Compiled As: Compiled as C Code (/TC)

Other info: non-CLR or unmanaged

To do: Sets the current locale to "Italian" and "French"

To show: Using the setlocale(), strftime() and gmtime() C functions

/* Sets the current locale to "Italian" and "French" using the setlocale() function */

#include <stdio.h>

#include <locale.h>

#include <time.h>

// The gmtime() is deprecated. You may use _gmtime_s(), _gmtime32_s(), _gmtime64_s() for the secure versions

int main(void)

{

time_t ltime;

struct tm *testime;

unsigned char locstr[100];

/* Set the locale to Italian */

setlocale(LC_ALL, "italian");

time(&ltime);

testime = gmtime(&ltime);

/* %#x is the long date representation, appropriate to the current locale */

if(!strftime((char *)locstr, 100, "%#x", (const struct tm *)testime))

printf("strftime failed!\n");

else

printf("In Italian locale, strftime returns \"%s\"\n", locstr);

/* Set the locale to French */

setlocale(LC_ALL, "french");

time(&ltime);

testime = gmtime(&ltime);

/* %#x is the long date representation, appropriate to the current locale */

if(!strftime((char *)locstr, 100, "%#x", (const struct tm *)testime))

printf("strftime failed!\n");

else

printf("In French locale, strftime returns \"%s\"\n", locstr);

/* Set the locale back to the default environment */

setlocale(LC_ALL, "C");

time(&ltime);

testime = gmtime(&ltime);

printf("Back to default...\n");

if(!strftime((char *)locstr, 100, "%#x", (const struct tm *)testime))

printf("strftime failed!\n");

else

printf("In 'C' locale, strftime returns \"%s\"\n", locstr);

return 0;

}

Output example:

In Italian locale, strftime returns "domenica 17 dicembre 2006"

In French locale, strftime returns "dimanche 17 décembre 2006"

Back to default...

In 'C' locale, strftime returns "Sunday, December 17, 2006"

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