【程序】*** 主程序SET TALK OFFCLEARSTORE 100 TO X,Y,ZSET PROCEDURE TO GC1DO PROCl WITH X,Y?

【程序】

*** 主程序

SET TALK OFF

CLEAR

STORE 100 TO X，Y，Z

SET PROCEDURE TO GC1

DO PROCl WITH X，Y

? X，Y，Z

SET PR()CEDURE TO

SET TALK ON

RETURN

*** 过程

PROCEDURE PROC1

PARAMETER M，N

M=M+100

N＝N+100

RETURN

X的输出结果为 ______。

A．100

B．200

C．300

D．400