Variable Function?

[SirCrono6]

I was wondering if it is possible to call a variable function? Such as:

std::string Func = "CallThisFunction";
Func();

It would call CallThisFunction... I doubt it's possible, but if it is it will save me quite a bit of coding

- SirCrono6

[Salem]

One way is to set up a map, so long as all the called functions have the same prototype.

Something along the lines of

#include <map>

typedef void (*fntype)(void);
std::map<std::string,fntype> mapping;

// then set things up
mapping["CallThisFunction"] = func;

// then use is
mapping["CallThisFunction"] ();

[7stud]

...ahhh, I was wondering how to conjure up an associative array in C++. You can do something similar with two 'parallel arrays' if the STL is too frightening or is hidden behind a cloud of ignorance:

string names[3] = {"func1", "func2", "func3"};
void (*pfuncs[3])(void) = {func1, func2, func3};

string f = "func2";
	
for(int i = 0; i < (sizeof names/sizeof names[0]); i++)
{
	if(names[i] == f)
		pfuncs[i]();
}

A function pointer starts with the pointer:

*pfunc

and then you add parentheses around it:

(*pfunc)

and then you add the return type and the parameter type(s):

void (*pfunc)(void)

For an array of function pointers, you add in the array size:

void(*pfuncs[3])(void)

That also requires that the return types and parameter types are identical for all your functions.