sparknotes
Why Use Pointers?
Problems
Problem : Write a function that takes pointers to two integers and swaps the values stored at those addresses.
Problem : Why doesn't this function swap the values correctly?
void swap(int a, int b)
{
int temp = a;
a = b;
b = temp;
}
Problem : Write a function which takes an array of 5 integers and sets all the values to 0.
Problem : Write a function void set_to_NULL(char **ptr); which takes a pointer to a pointer to a character and sets the memory at that address to NULL.
Problem : CHALLENGE: Write a swap function that doesn't use a temporary variable for storage. Hint: use the XOR operator. Are there any cases in which this won't work?
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