r*r
2 楼
I feel that I need to delete everytime after I use "new" to create a pointer.
What if I want to put the new inside a loop?For example
myobj * np;
for (int i =1;i
np = new myobj();
}
delete np;
will this work?Or do I have to delete np inside the loop?
What if I want to put the new inside a loop?For example
myobj * np;
for (int i =1;i
np = new myobj();
}
delete np;
will this work?Or do I have to delete np inside the loop?
R*r
3 楼
Your program will have memory leak, delete it inside loop.
.
【在 r*****r 的大作中提到】
: I feel that I need to delete everytime after I use "new" to create a pointer.
: What if I want to put the new inside a loop?For example
: myobj * np;
: for (int i =1;i
: np = new myobj();
: }
: delete np;
: will this work?Or do I have to delete np inside the loop?
.
【在 r*****r 的大作中提到】
: I feel that I need to delete everytime after I use "new" to create a pointer.
: What if I want to put the new inside a loop?For example
: myobj * np;
: for (int i =1;i
: np = new myobj();
: }
: delete np;
: will this work?Or do I have to delete np inside the loop?
r*r
4 楼
then I guess I also need to declare myobj * np inside the loop?
【在 R*******r 的大作中提到】
: Your program will have memory leak, delete it inside loop.
:
: .
【在 R*******r 的大作中提到】
: Your program will have memory leak, delete it inside loop.
:
: .
m*n
5 楼
It won't work. Even if you define np outside the loop.
You have to do:
myobj * np;
for (int i = 1; i < nloop; ++i)
{
...
np = new myobj();
...
delete np;
}
or you could you smart pointer:
#include
for (int i = 1; i < nloop; ++i)
{
...
std::auto_ptr np(new myboj());
(use np just like plain poiters)
}
.
【在 r*****r 的大作中提到】
: I feel that I need to delete everytime after I use "new" to create a pointer.
: What if I want to put the new inside a loop?For example
: myobj * np;
: for (int i =1;i
: np = new myobj();
: }
: delete np;
: will this work?Or do I have to delete np inside the loop?
You have to do:
myobj * np;
for (int i = 1; i < nloop; ++i)
{
...
np = new myobj();
...
delete np;
}
or you could you smart pointer:
#include
for (int i = 1; i < nloop; ++i)
{
...
std::auto_ptr
(use np just like plain poiters)
}
.
【在 r*****r 的大作中提到】
: I feel that I need to delete everytime after I use "new" to create a pointer.
: What if I want to put the new inside a loop?For example
: myobj * np;
: for (int i =1;i
: np = new myobj();
: }
: delete np;
: will this work?Or do I have to delete np inside the loop?
r*r
6 楼
then I guess I also need to declare myobj * np inside the loop?
【在 R*******r 的大作中提到】
: Your program will have memory leak, delete it inside loop.
:
: .
【在 R*******r 的大作中提到】
: Your program will have memory leak, delete it inside loop.
:
: .
c*r
7 楼
Even you declare it as a globle or static, it doesn't matter.
new abd delete must match!
outside
【在 r*****r 的大作中提到】
: then I guess I also need to declare myobj * np inside the loop?
new abd delete must match!
outside
【在 r*****r 的大作中提到】
: then I guess I also need to declare myobj * np inside the loop?
N*y
8 楼
you should NOT use np in this way. Since you are using it more like a local
variable, you should allocate the memory block outside the loop.
outside
【在 r*****r 的大作中提到】
: then I guess I also need to declare myobj * np inside the loop?
variable, you should allocate the memory block outside the loop.
outside
【在 r*****r 的大作中提到】
: then I guess I also need to declare myobj * np inside the loop?
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