I have a struct typedef struct { vars etc char* charPtr; }STRUCT; I then declare an array of these structs using new: STRUCT* StructArr=new STRUCT[Num]; i have a number of functions that return a char* created with new and do this: StructArr.charPtr=GetData(blah,blah); Now when i want to clean up can i just do delete[]StructArr? Will that delete all the charPtr''s created? Or do I have to manually delete[] the charPtr''s like: for (x;x<Num;x++) delete[]StructArr.charPtr I''m asking this because I have a huge memory leak from the function that creates the char* (GetData()) but I do delete[]StructArr as soon as I am able to (once i no longer need the data). Im not too hot on using new in functions and then deleting them outside of that function so this has me a bit puzzled as I cannot delete the StructArr any earlier than I am doing at the moment. If anyone has any tips to give me I would be grateful. Thanks.

No, the delete Structs[] won''t delete the allocated char buffers, you will have the iterate through the struct array, deleting each allocated buffer.

Daniel.

PD: if you are allocating the char buffers with new [] don''t forget to free with delete []!

No, the delete Structs[] won''t delete the allocated char buffers, you will have the iterate through the struct array, deleting each allocated buffer.

Daniel.

PD: if you are allocating the char buffers with new [] don''t forget to free with delete []!

structs can have constructors and destructors just like classes, use them.

i.e. change your struct to:

struct STRUCT
{
vars etc
char* charPtr;

STRUCT() {charPtr = NULL;}
~STRUCT() {delete [] charPtr;}
};

now when you delete your array the charPtrs will get cleaned up also.

-Mike

great!! thanks guys.

Anon Mike>I didnt know that thanks for the info

To Anon Mike:
Using constructors and destructors with structs is sick!

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To Zeke:
new and delete are keywords from c++, this means you are programming c++. So why on earth do you want to use structs? I recommend you use classes:

class STRUCT{public: vars etc char* charPtr;};

And why do you use char * charwhatever ?
In c++ you can use the very comfortable

<string>

class.

Edited by - Jonus on July 12, 2001 3:59:32 PM

Jonus>Thanks for the info. The reason I was using structs instead of classes was because they didnt need to have any functions and I figured in that case I might aswell use the simpler struct than class. But now that I need them to have a constructor and a destructor I might aswell change them to classes. Im using char* instead of string is simply because I dont know anything about string. Thanks again for the info

quote:

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Original post by Jonus
To Anon Mike:
Using constructors and destructors with structs is sick!

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To Zeke:
new and delete are keywords from c++, this means you are programming c++. So why on earth do you want to use structs?

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Because structs and classes are the same thing with exception of the default range of the members. In a class by default are all members private in a struct all class members are public.

so in C++

struct SomeStruct{ char *pStr;}

is the same as

class SomeClass{public: char *pStr;}

/JanneVee
"Some People even believe that COBOL is a real programming language." Scott Meyers - Effective C++