从键盘上任意输入3 个整数x、y、z，并按从大到小的顺序显示出来，请编写该程序。要求：输入时x、y、z三个变量中的数是无序的，通过程序处理后，x是最大值，y是次大值，z是最小值。-Any input from the keyboard three integers x, y, z, and press in descending order, write the program. Requirements: The number in the three variables x, y, and z when the input is disordered, procedures, x is the maximum value, y is the second largest value, z is the minimum value.