C Exercises: Convert a tm object to custom textual representation
C Date Time: Exercise-4 with Solution
Write a program in C to convert a tm object to custom textual representation.
Sample Solution:
C Code:
#include <stdio.h>
#include <time.h>
#include <locale.h>
int main(void)
{
char time_buff[70];
struct tm mytime = { .tm_year=116, // = year 2016
.tm_mon=8, // = 9th month
.tm_mday=2, // = 2nd day
.tm_hour=16, // = 16 hours
.tm_min=30, // = 30 minutes
.tm_sec=32 // = 32 secs
};
printf("\n The textual representation of specified date and time :\n");
if (strftime(time_buff, sizeof time_buff, "%B %c %P" , &mytime))
{
puts(time_buff);
} else {
puts("strftime failed");
}
setlocale(LC_TIME, "el_GR.utf8");
if (strftime(time_buff, sizeof time_buff, "%B %c %P", &mytime)) {
puts(time_buff);
} else {
puts("strftime failed");
}
printf("\n");
}
Sample Output:
The textual representation of specified date and time : September Sun Sep 2 16:30:32 2016 pm September Sun Sep 2 16:30:32 2016 pm
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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