c pointers operations code example
Example: c function pointer
//Declaration of a pointer to a function that takes an integer
//and returns an integer.
int (*f_ptr)(int);
//Assignment of a function foo to the function pointer f_ptr declared above.
f_ptr = foo;
//Calling foo indirectly via f_ptr, passing the return value of foo to r.
int r = f_ptr(v);
//Assigning an address of a function to the function pointer f_ptr,
//then calling foo by dereferencing the function pointer.
f_ptr = &foo;
int r = (*f_ptr)(v);