Pointer (computer Programming) - Function Pointer

Function Pointer

In some languages, a pointer can reference a function. The function pointer will store the address location of the function to be invoked. While this facility can be used to call functions dynamically, It is often the favorite method of virus and other malicious software writers. For example, in C it is possible to define a function pointer.

int a,b,x,y; int sum(int no1,int no2); // Function with two integer arguments which returns an integer value int (*fp)(int,int); // Function pointer which can point to a function like sum fp = ∑ // fp now points to Function sum x = (*fp)(a,b); y = sum(a,b); // Both lines call the function sum with parameters a and b

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