Recursion first occurance

#1

sir please tell me where should we use pointers for arrays and where we not use pointers.

#2

are you taking about dynamic memory allocation??

int*arr=new int[n];

this thing?

#3

During Recursion we are sometime using pointer and sometime we are not Using. So tell me where we have to use pointer

#4

correct reason for this is

In C++, array parameters are treated as pointers So the expression sizeof(arr)/sizeof(arr[0]) becomes sizeof(int *)/sizeof(int) which results in 1 for IA 32 bit machine (size of int and int * is 4) irrespective of the size of the array.

Therefore, sizeof should not be used to get number of elements in such cases. A separate parameter for array size (or length) should be passed to fun().

you can use pointers instead of array always