*设计一个程序使其计算圆，矩形，正方形的面积。 *定义一个结构体，可以准确的显示用户输入的年，月，日，时，秒，分。 -* Design a program to calculate a round, rectangular, square area.* Define a structure that can accurately display the user to enter the year, month, day, hour, seconds, minutes.