bool型判断一年是否是闰年

#include<stdio.h>
#include<stdbool.h>
int main()
{
int year;
bool leap;
scanf("%d", &year);
if (year % 4 == 0)
{
if (year % 100 == 0)
{
if (year % 400 == 0)
leap = true;
else
leap = false;
}
else
leap = true;
}
else
leap = false;
if (leap == true)
printf("%d是闰年.\n", year);
else
printf("%d不是闰年.\n", year);
return 0;
}