设计模式比较器电路：电路的输入为两个8位无符号二进制数a、b和一个模式控制信号m；电路的输出为8位无符号二进制数y。当m=0时，y=MAX(a,b) 而当m=1时，则y=MIN(a,b)。要求用多层次结构设计电路，即调用数据选择器和比较器等基本模块来设计电路。-Design pattern comparator circuit: circuit input as two 8-bit unsigned binary numbers a, b and a mode control signal m　circuit output is 8-bit unsigned binary number y. When when m = 0, y = MAX (a, b)　and when m = 1, then y = MIN (a, b). Requires a multi-level structure design circuits that call data selector and comparators basic modules to design circuits.