要求把从键盘输入的0~FFFFH的十六进制正数转换为十进制数并在屏幕上显示出来。程序主要由十六进制转换二进制、二进制转换十进制两个子程序组成，可将主程序和子程序放在同一程序模块中，在子程序中省略对寄存器的保护和恢复工作，子程序之间的参数传送则采用寄存器传送方式-Demanded from the keyboard input 0 ~ FFFFH hexadecimal number is converted to a decimal number and displayed on the screen. Mainly by the hex conversion program binary, binary conversion decimal composed of two subroutines can be on the same main program and subroutine program modules, in the subroutine is omitted on the register in the protection and recovery efforts, among subroutines parameters of transmission transmission mode is applied Register