C Exercises: Convert a tm object to custom wide string textual representation
C Date Time: Exercise-5 with Solution
Write a program in C to convert a tm object to custom wide string textual representation.
Sample Solution:
C Code:
#include <stdio.h>
#include <time.h>
#include <wchar.h>
#include <locale.h>
int main(void)
{
wchar_t buff[40];
struct tm mytime = { .tm_year=116, // = year 2016
.tm_mon=8, // = 9th month
.tm_mday=2, // = 2nd day
.tm_hour=17, // = 17 hours
.tm_min=51, // = 51 minutes
.tm_sec=10 // = 10 secs
};
printf("\n The textual representation of specified date and time :\n");
if (wcsftime(buff, sizeof buff, L"%A %c", &mytime)) {
printf("\n%ls\n", buff);
} else {
puts("wcsftime failed");
}
setlocale(LC_ALL, "en_US.UTF-8");
if (wcsftime(buff, sizeof buff, L"%A %c", &mytime)) {
printf("%ls\n\n", buff);
} else {
puts("wcsftime failed");
}
}
Sample Output:
The textual representation of specified date and time : Sunday 09/02/16 17:51:10 Sunday 09/02/16 17:51:10
Flowchart:

C Programming Code Editor:
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C Programming: Tips of the Day
How I can print to stderr in C?
The syntax is almost the same as printf. With printf you give the string format and its contents i.e.:
printf("my %s has %d chars\n", "string format", 30);
With fprintf it is the same, except now you are also specifying the place to print to:
File *myFile; ... fprintf( myFile, "my %s has %d chars\n", "string format", 30);
Or in your case:
fprintf( stderr, "my %s has %d chars\n", "string format", 30);
Ref : https://bit.ly/3v5U8Zq
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