void solve()
{
int *a = (int*)malloc(1000000000*sizeof(int));//case 1
cout<<1<<endl;
return;
}
So recently I was asked a question? Why this code compile and does not give RTE, it had to do something with virtual memory if you use a vector array instead it will provide bad_alloc as RTE. So what is the reason behind it or is it compiler dependent?
But the hint was to think about how virtual memory can be used here.
Malloc return value:
On success, a pointer to the memory block allocated by the function. The type of this pointer is always
void*, which can be cast to the desired type of data pointer in order to be dereferenceable. If the function failed to allocate the requested block of memory, a null pointer is returned.Malloc exceptions (C++):
No-throw guarantee: this function never throws exceptions.
So, malloc just gives a null pointer if it could not allocate memory.