Answer 1

yes you can,
just create an array of pointers to some functions.
ex:
//two functions
int addition(int x, int y) ;
int square(int x, int y) ;
//array of pointers to functions
int (*pointer_array[2]) (int x, int y) ;
//add function pointers to array
pointer_array[0] = addition ;
pointer_array[1]= square ;
//call functions (addition) using array
res = (*pointer_array[0]) (num1, num2) ;