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C Exercises: Convert a time_t object to a textual representation

C Date Time: Exercise-3 with Solution

Write a program in C to convert a time_t object to a textual representation.

Sample Solution:

C Code:

#define __STDC_WANT_LIB_EXT1__ 1
#include <time.h>
#include <stdio.h> 

int main(void)
{
    time_t result = time(NULL);
    printf("\n%s\n", ctime(&result));
#ifdef __STDC_LIB_EXT1__
    char time_str[26];
    ctime_s(time_str,sizeof time_str,&result);
    printf("\n%s\n", time_str);
#endif
}

Sample Output: 

Thu Aug 03 13:44:49 2017

N.B.: The result may varry for your current system date and time.

Flowchart:

Flowchart: Convert a time_t object to a textual representation

C Programming Code Editor:

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP