技術標籤：c

將判斷閏年的功能定義為子函式，通過呼叫該函式判斷輸入範圍內哪些是閏年，輸出並統計閏年的總數

#include <stdio.h>
#include <math.h>
int runnian (int year)
{
	int flag = 0;
	if( ( year  % 4 == 0 && year % 100 !=0 ) || year % 400 == 0)
	{
		printf("%5d", year);
		flag = 1;
	}
	return flag;
}

int main ()
{	
	int min ,
 
 max , i , n = 0;
	printf("請輸入年份範圍：\n");
	scanf("%d%d", &min , &max);
	printf("%d到%d之間閏年有：\n", min , max);
	for( i = min; i <= max; i++)
	{
		if(runnian(i) == 1)
		{
			if(++n % 5 == 0)
				printf("\n");
		}
	}
	printf("\n%d到%d年之有%d個閏年。\n", min ,
 
 max , n);
}