Re: [algogeeks] Re: memory allocation question
int(*p)[col];
Here, p is a pointer to an array of 4 integers.
Size of *p is 4X4 = 16.
p=(int(*)[col])malloc(row*sizeof(*p));
here clearly 3X 16 = 48 bytes of memory is being allocated.
On Sat, Sep 3, 2011 at 9:14 PM, piyush agarwal wrote:
> no. of rows is 3
> size of (*p) is 12
> then how can 48 be the no. of bytes ??
>
> On Sat, Sep 3, 2011 at 8:32 AM, Deepak Garg wrote:
>
>> +1
>>
>>
>> On Sat, Sep 3, 2011 at 8:57 PM, Ankuj Gupta wrote:
>>
>>> p is a pointer to an array of 4 integers. So when you do (int(*)
>>> [col])malloc(row*sizeof(*p)) total of 48 bytes is allocated as
>>> sizeof(*p) is 12 bytes.
>>>
>>> On Sep 3, 4:14 pm, rohit wrote:
>>> > how many bytes are allocated by following code?
>>> >
>>> > #include
>>> > #define col 4
>>> > #define row 3
>>> >
>>> > int main()
>>> > {
>>> > int(*p)[col];
>>> > p=(int(*)[col])malloc(row*sizeof(*p));
>>> >
>>> > return 0;
>>> >
>>> > }
>>> >
>>> > please explain answer?
>>>
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>>
>>
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>> U.D.I.T
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>
>
>
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> Piyush Agarwal
> Final Year Undergraduate
> Department of Computer Engineering
> Malaviya National Institute of Technology
> Jaipur
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Re: [algogeeks] Re: memory allocation question
no. of rows is 3
size of (*p) is 12
then how can 48 be the no. of bytes ??
On Sat, Sep 3, 2011 at 8:32 AM, Deepak Garg wrote:
> +1
>
>
> On Sat, Sep 3, 2011 at 8:57 PM, Ankuj Gupta wrote:
>
>> p is a pointer to an array of 4 integers. So when you do (int(*)
>> [col])malloc(row*sizeof(*p)) total of 48 bytes is allocated as
>> sizeof(*p) is 12 bytes.
>>
>> On Sep 3, 4:14 pm, rohit wrote:
>> > how many bytes are allocated by following code?
>> >
>> > #include
>> > #define col 4
>> > #define row 3
>> >
>> > int main()
>> > {
>> > int(*p)[col];
>> > p=(int(*)[col])malloc(row*sizeof(*p));
>> >
>> > return 0;
>> >
>> > }
>> >
>> > please explain answer?
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "Algorithm Geeks" group.
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>>
>>
>
>
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> U.D.I.T
>
> Sent by Nokia OVI (c)
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Piyush Agarwal
Final Year Undergraduate
Department of Computer Engineering
Malaviya National Institute of Technology
Jaipur
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Re: [algogeeks] Re: memory allocation question
+1
On Sat, Sep 3, 2011 at 8:57 PM, Ankuj Gupta wrote:
> p is a pointer to an array of 4 integers. So when you do (int(*)
> [col])malloc(row*sizeof(*p)) total of 48 bytes is allocated as
> sizeof(*p) is 12 bytes.
>
> On Sep 3, 4:14 pm, rohit wrote:
> > how many bytes are allocated by following code?
> >
> > #include
> > #define col 4
> > #define row 3
> >
> > int main()
> > {
> > int(*p)[col];
> > p=(int(*)[col])malloc(row*sizeof(*p));
> >
> > return 0;
> >
> > }
> >
> > please explain answer?
>
> --
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>
>
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U.D.I.T
Sent by Nokia OVI (c)
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