编写两个汇编语言子程序，分别返回系统的当前日期和时间；编写一个C语言程序，调用汇编语言子程序， 显示系统的当前日期和时间-Write two assembly language subroutine, return the current system date and time write a C program to call assembly language subroutines, display system' s current date and time