what is meant by memory leak and what is the concept of dangling pointer,inreference to question 4 of mcq pointers.
Pointers and dynamic memory allocation
Hello @anjalirai36,
- A memory leak occurs when programmers create a memory(Dynamic memory allocation) in heap and forget to delete it.
/
Example:
void f()
{
int *ptr = new int;/* Do some work */
return; /* Return without freeing ptr*/
}
/
To avoid memory leaks, memory allocated on heap should always be freed when no longer needed.
void f()
{
int *ptr = new int;/* Do some work */
delete(ptr);
return;
}
- A pointer pointing to a memory location that has been deleted (or freed) is called dangling pointer.
void f()
{
int *ptr = new int;/* Do some work */
delete(ptr);
// No more a dangling pointer ptr = NULL;return;
}
Hope, this would help.
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