Practical C Programming

How to do it…

Follow these steps to ensure that the pointer is not NULL and is pointing to a memory address by making use of assertions:

1. Define an array containing a number of integers whose average is to be computed:

int arr[]={3,9,1,6,2};

2. Set a pointer to point to the array:

ptr=arr; 

3. Define a function for calculating the average of the array elements. A pointer to an array and the count of the number of values in the array are both passed to this function:

average=findaverage(ptr, count); 

4. In the function, define an assert expression that ensures that the pointer is not NULL. If the pointer is NULL, the program will display an error and will be aborted:

assert(Ptr != NULL && "Pointer is not pointing to any array"); 

5. If the pointer ...