Calculate the day of the year and implement it in C language

Calculate the day of the year ,C Language implementation

#include <stdio.h>
int isleap(int year)
{
    
	int leap;
	leap = (year % 4 == 0 && year % 100 != 0 || year % 400 == 0);
	return leap;
}

int fun(int year, int month, int day)
{
    
	int table[13] = {
     0,31,28,31,30,31,30,31,31,30,31,30,31 };
	int days = 0, i;
	for ( i = 1; i < month; i++)
	{
    
		days = days + table[i];
	}
	days = days + day;
	if (isleap(year)&&month>2)
	{
    
		days = days + 1;
		return days;
	}
}
main()
{
    
	int year, month, day, days;
	printf(" Please enter year 、 month 、 Japan ：");
	scanf_s("%d%d%d", &year, &day, &days);
	days = fun(year, month, day);
	printf("%d year %d month %d Day is the... Of the year %d God \n", year, month, day, days);
}

Code

“ I'm the bigger stone in the river
Divide the tears into two equal parts
A flowing father
A flowing mother .”

Hidden Fairy

Abandon thousands of buildings , The dust returns to the end of the world .
Smoke curled up , Floating clouds and rising clouds .
The bamboo fence is short , Lying drunk in the sunset .
Startled by the bright moon shadow , Carry a pot and return home .
Tread lightly on the grass , Take another look at the fallen flowers .
It's hard to tell what you like , Say what you want .
Later, he wrote many poems and some words ,
Idle days float and live extravagant thoughts , Steal the play of quefenglin garden .
Keep talking and laughing , I don't know why .
first , first , Eyes full of willows and Orioles swallow .