Is it critical to release variable memory in a function?

Hello,
suppose we declared and initialized two variable in a function like this:

Code:

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int function test()
{

CString str;
int index;
str="this is a test";
i=0;
//other statements to manipulate these variables
return TRUE;

}

---

Now suppose we call this function from main function.Am I must release the memory allocated by str and index variables or they will be released automatically after termination of the function?
if the application ended, memories that allocated by these 2 variables will release automatically or I have to release them manually?
Please consider that one of them (str) is a Class and another (index) is a base variable.
Thanks alot !

The way you use them here, they will be freed automatically.
However, if you would define them as follows:

Code:

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CString* pStr = new CString();

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Then you need to free them:

Code:

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delete pStr;

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