经典Ｃ源程序100例 如题目：输入某年某月某日，判断这一天是这一年的第几天？ 题目：输入三个整数x,y,z，请把这三个数由小到大输出。-Classic C source of 100 cases as subject: Enter One day a certain period to determine the day of the year, the first few days? Title: Enter three integers x, y, z, please put the