结构体\年月日

 注意：C语言里面是没有bool（布尔）类型的

我这里用的是vs2010里的.cpp

 typedef的用法：

typedef struct 函数原名（可以不加）

{

。。。。。

}定义后的名字（必须要写）;

>>>>>>之后就可以直接使用定义后的名字了

#include
#include

//定义结构体
typedef struct date
{
	int month;
	int day;
	int year;
}d;

//函数声明
bool isleap(struct date d);
int numberofdays(struct date d);

int main()
{
	struct date today,tomorrow;

	//输入
	printf("请输入今天的日期(yyyy,dd,mm):");
	scanf("%i,%i,%i",&today.year,&today.month,&today.day);

	//判断并对年月日加以修改
	if(today.day!=numberofdays(today))
	{
		tomorrow.day=today.day+1;
		tomorrow.month=today.month;
		tomorrow.year=today.year;
	}
	else if(today.month==12)
	{
		tomorrow.day=1;
		tomorrow.month=1;
		tomorrow.year=today.year+1;
	}
	else
	{
		tomorrow.day=1;
		tomorrow.month=today.month+1;
		tomorrow.year=today.year;
	}

	//输出
	printf("明天的日期为%i-%i-%i\n",
		tomorrow.year,tomorrow.month,tomorrow.day);

	system("pause");
	return 0;
}

//函数定义
bool isleap(struct date d)
{
	bool leap=false;
	if((d.year%3==0 && d.year%100!=0) || d.year%400==0)
		leap=true;
	return leap;
}

int numberofdays(struct date d)
{
	int days;
	const int dayspermonth[12]={31,28,31,30,31,30,31,31,30,31,30,31};
	if(d.month==2 && isleap(d))
		days=29;
	else
		days=dayspermonth[d.month-1];
	return days;
}