Interested to Buy Any Domain ? << Click Here >> for more details...
What is dangling pointers?and what is memory leak?
- 5 Answers
- 43245 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
A1 - Dangling pointer points to a memory location which is
being removed.
E.g.
int* a = new int;
int *b = a;
delete b;
Now a will be a dandling pointer.
A2 - Memory leaks occur when memory allocated to a pointer
is not deleted and the pointer goes out of scope. This
allocated memory never gets de-allocated and remains in the
heap until the system is restarted.
E.g.
void foo()
{
int* ptr = new int;
*ptr = 10;
...
...
}
Since ptr is allocated memory using 'new', but no 'delete'
is called, hence memory allocated to ptr will leak.
| Is This Answer Correct ? | 106 Yes | 22 No |
Answer / prakash
dangling pointer : Dangling pointers in computer
programming are pointers that do not point to a valid
object of the appropriate type. Dangling pointers arise
when an object is deleted or deallocated, without modifying
the value of the pointer, so that the pointer still points
to the memory location of the deallocated memory.
memory leak:A memory leak in computer science is a
particular type of unintentional memory consumption by a
computer program where the program fails to release memory
when no longer needed.
ex:
void f(void)
{
void* s;
s = malloc(50); /* get memory */
return;
}
//control comes out w/o freeing the memory....
| Is This Answer Correct ? | 70 Yes | 13 No |
Answer / kush
a dangling pointer is a pointer which points to a dead location in memory, means the variable or object is exist on that memory location bt that was deleted and pointer is still pointing to that location . this pointer is called dangling pointer.
EX:
int *function()
{
int a=500;
return &a;
}
int main()
{
int *ptr;
ptr=function();
++*ptr;
printf("%d",*ptr);//output=501
}
in the above example one function is there which is having return type int * means this function retuns a address.
now came int main(), i have creating one pointer *ptr and after that calling the function then whatever the address return by function is stored in *ptr.
but see the storage class of variable a in function it is auto by default and when function execution is end that variable is destroyed and funtion will return the address of variable a.
tha variable is destroy bt my *ptr is still pointing and utilizing that meroy location and data on that location this is called dangling pointer..
thanks...
| Is This Answer Correct ? | 28 Yes | 5 No |
Answer / shamoona
Dangling Pointer
dangling pointer point to unknown destination
for example
int*ptr;
{
int a=5;
ptr=
| Is This Answer Correct ? | 1 Yes | 4 No |
declare an array of structure where the members of the structure are integer variable float variable integer array char variable access all elements of the structure using dot operator and this pointer operator
What number of digits that can be accuratly stored in a float (based on the IEEE Standard 754)? a) 6 b) 38 c) An unlimited number
Why do we need function?
What are manipulators in c++ with example?
What are the different data types present in C++?
Write about the various sections of the executable image?
Is string data type in c++?
What is setbase c++?
Define a program that reads two matrices of size 3x3 with real values from the user then prints their sum, difference and multiplication.
What's the hardest coding language?
Explain about profiling?
What is abstract keyword in c++?
STL 
