Passing Structures to Functions in C as a parameter to a function, structures may be passed as a parameter to a function, just as any of the basic data types. The following example uses a structure called date that has is passed to an isLeapYear function to determine if the year is a leap year

Passing Structures to Functions in C

Structures may be passed as a parameter to a function, just as any of the basic data types. The following example uses a structure called date that has is passed to an isLeapYear function to determine if the year is a leap year.

Normally you would only pass the day value, but the whole structure is passed to illustrate passing structures to functions.

#include <stdio.h>
#include <string.h>

struct month
{
char *name;
char *abbreviation;
int days;
} month_details[] =
{
"Junk", "Junk", 0,
"January", "Jan", 31,
"February", "Feb", 28,
"March", "Mar", 31,
"April", "Apr", 30,
"May", "May", 31,
"June", "Jun", 30,
"July", "Jul", 31,
"August", "Aug", 31,
"September", "Sep", 30,
"October", "Oct", 31,
"November", "Nov", 30,
"December", "Dec", 31
};

struct date
{
int day;
int month;
int year;
};

int isLeapYear(struct date d);

int main()
{
struct date d;

printf("Enter the date (eg: 11/11/1980): ");
scanf("%d/%d/%d", &d.day, &d.month, &d.year);

printf("The date %d %s %d is ", d.day,
month_details[d.month].name, d.year);

if (isLeapYear(d) == 0)

printf("not ");
puts("a leap year");

return 0;
}
int isLeapYear(struct date d)
{
if ((d.year % 4 == 0 && d.year % 100 != 0) ||
d.year % 400 == 0)
return 1;
return 0;
}

And the Execution of the program will be as follows:

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