s*****g
发帖数: 5159 | 1 First, thank you for looking into my post, I sincerely appreciate your help.
I have a program that takes one input parameter, that determines the datatyp
e will be used in my program. |
d**e
发帖数: 6098 | 2 if declare p inside "if", it will be out of scope after "if"
how if declare "vector * p"
and then inside "if", p = new vector() or vector() ?
help.
datatyp
【在 s*****g 的大作中提到】
: First, thank you for looking into my post, I sincerely appreciate your help.
: I have a program that takes one input parameter, that determines the datatyp
: e will be used in my program.
|
z****e
发帖数: 2024 | 3 "vector * p"？
is it a type? |
d**e
发帖数: 6098 | 4 hehe..not quite sure...
i don't have a machine to test right now..
i just try to see if i could do it by new a pointer...
【在 z****e 的大作中提到】
: "vector * p"？
: is it a type?
|
s*****g
发帖数: 5159 | 5 I tried and this this does now work.
vector *p must have template defined at declaration.
I am also thinking of using typedef, but I do not know if there is a type fo
r variables's type, like |
t****t
发帖数: 6806 | 6 you simply can't do it that way. C++ type is static, therefore declaring (
new) type according to runtime input is impossible.
you may get around with polymorphism. however vector and vector
does not have a common base, you have to wrap them yourself.
help.
datatyp
【在 s*****g 的大作中提到】
: First, thank you for looking into my post, I sincerely appreciate your help.
: I have a program that takes one input parameter, that determines the datatyp
: e will be used in my program.
|
s*****g
发帖数: 5159 | 7 I see. Thanks.
I thought of this in my last post.
>
【在 t****t 的大作中提到】
: you simply can't do it that way. C++ type is static, therefore declaring (
: new) type according to runtime input is impossible.
: you may get around with polymorphism. however vector and vector
: does not have a common base, you have to wrap them yourself.
:
: help.
: datatyp
|
