下列程序执行的结果为( )。 A = "HELLOCANIHELPYOU"

问题单项选择题

下列程序执行的结果为( )。
A = "HELLOCANIHELPYOU"
B = "WANGCHANGLI"
C = Left(A,5) +"!"
D = Right(A, 7)
E = Mid(A, 6, 4)
F = Mid(B, Len(B) -6) + "!"
G = E+ " " + D + " ! "
H = C +" " + F
Print H + " " + G

A．HELLO! CHANGLI! CANIHELPYOU!

B．HELLO! WANG! CANIHELPYOU

C．HELLO! CANIHELPYOUI

D．HELLO! CHANG! CANIHELPYOU!

答案

参考答案：A

解析：本题D=Right(A，7)="HELPYOU", Mid(Str，Start，[Length])返回字符串Str从位置Start开始长度为Length的字符串。如果Start大于Str的长度，则返回空值。参数Length可忽略，此时返回自Start位置以后的所有字符。如果Length大于自Start位置以后的所有字符数，则等同于该参数忽略，本题中：
E=Mid(A, 6, 4)= "CANI"；
F = Mid(B, Len(B) - 6) + "!" = "CHANGLI!";
G = E + " " + D +" !" = "CANIHELPYOU!";
H = C+ " " + F = "HELLO! CHANGLI!";
H + " " + G = "HELLO! CHANGLI! CANIHELPYOU!\