Facts about function pointers
C Programming Language Pointer in C Language (Article) Pointer in C Language (Program)
853Program:
#include // A normal function with an int parameter // and void return type void fun(int a) { printf("Value of a is %d\n", a); } int main() { void (*fun_ptr)(int) = fun; // & removed fun_ptr(10); // * removed return 0; }
Output:
Value of a is 10
Explanation:
some interesting facts about function pointers
1. Unlike normal pointers, a function pointer points to code, not data. Typically a function pointer stores the start of the executable code.
2. Unlike normal pointers, we do not allocate de-allocate memory using function pointers.
3. A function’s name can also be used to get functions’ address. For example, in the below program, we have removed address operator ‘&’ in assignment. We have also changed function call by removing *, the program still works.
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