Editing Pointer (computer programming) (section)

====Function pointer====
In some languages, a pointer can reference executable code, i.e., it can point to a function, method, or procedure. A [[function pointer]] will store the address of a function to be invoked. While this facility can be used to call functions dynamically, it is often a favorite technique of virus and other malicious software writers.

<syntaxhighlight lang="C">
int sum(int n1, int n2) {   // Function with two integer parameters returning an integer value
    return n1 + n2;
}

int main(void) {
    int a, b, x, y;
    int (*fp)(int, int);    // Function pointer which can point to a function like sum
    fp = &sum;              // fp now points to function sum
    x = (*fp)(a, b);        // Calls function sum with arguments a and b
    y = sum(a, b);          // Calls function sum with arguments a and b
}
</syntaxhighlight>