判断日期是该年的第几天

判断日期是该年的第几天

void date()
{
    
    
	int i,year,month,date,sum = 0;
	printf("请输入年、月、日:");
	scanf("%d %d %d",&year,&month,&date);
	int a[12] = {
    
    31,28,31,30,31,30,31,31,30,31,30,31};
	int b[12] = {
    
    31,29,31,30,31,30,31,31,30,31,30,31};
	if((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0))
	{
    
    
		for(i = 0;i <= month - 2;i++)
		{
    
    
			sum += b[i];
		}
	}
	else
	{
    
    
		for(i = 0;i <= month - 2;i++)
		{
    
    
			sum += a[i];
		}
	}
	sum = sum + date;
	printf("是该年的第%d天\n",sum);
}