Question

In c language which header would you expect to find a function that determines the current day of the week

(a) A function that determines the current day of the week
(b) A function that tests whether a character is a digit
(c) A macro that gives the largest unsigned int value
(d) A function that rounds a floating-point number to the next higher integer
(e) A macro that specifies the number of bits in a character

Answer 1

The header file time.h in C language provides the function strftime to determine the current day of the week.

Step-by-step explanation:

In C language, the header time.h provides a function called strftime that can be used to determine the current day of the week. This function takes a format string as an argument and returns a string representation of the current date and time according to the provided format.

Here is an example code snippet that demonstrates how to use the strftime function to determine the current day of the week:

#include <stdio.h>
#include <time.h>

int main() {
time_t t = time(NULL);
struct tm *tm = localtime(&t);
char dayOfWeek[20];
strftime(dayOfWeek, sizeof(dayOfWeek), "%A", tm);
printf("Current day of the week: %s\\", dayOfWeek);
return 0;
}

In this example, the strftime function formats the date and time according to the "%A" format specifier, which represents the full name of the day of the week, like "Monday", "Tuesday", etc.