What is the problem with the following code #include<stdio.h>
int main()
{
int *ptr = (int *)malloc(sizeof(int));
ptr = NULL;
free(ptr);
}
A) Dangling Pointer
B) Memory leak
C) The program may crash as free() is called for NULL pointer.
D) Compiler Error
how option b is correct
@sandeep021 free() can be called for NULL pointer, so no problem with free function call.
The problem is memory leak because p is allocated some memory which is not freed because the pointer is assigned as NULL. The correct sequence should be
free ( p );
p = NULL;
So correct answer is B
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