hi2vino

 Profile Answers by hi2vino 

• Sep 13th, 2005

 

Just call the function names string as string() if the string function have no parameter if it have parameter then pass the corresponig value through the function call

Ilan

• Apr 1st, 2007

 

this strongly depends on the language and library you're using. Some object oriented languages support a notion of reflection or introspection, where you can use a built in api to query objects, iterate over their methods and even invoke them. C++ has RTTI, java has java.lang.reflect or something simillar.

To implement simillar behavior in C, with gcc,

1. compile your program with  --export-dynamic on the gcc command line
2. link with -ldl (dynamic library handling, needed for dlopen and dlsym
3. call dlopen() with a null parameter, meaning you aren't loading symbols from a file but from the current executable
4. call dlsym() with the name of the function you'll be calling. Note that C++ modifies function names, so If you're trying this with C++, you'd have to either declare this function as extern "C", or figure out what name the function has after compiling. (On unix, you could run nm -s on the object file for this).
5. if dlsym() returns non-null, use the returned value as a function pointer to invoke your function.

jbanx

 Profile Answers by jbanx Questions by jbanx

• Jun 6th, 2007

 

Hi, This is a typical example of reflection. If you are using .NET then use reflection for this purpose. In this case you create an object of a particular  type and the invoke methods at run time by passing function name.

neeraj

• Oct 26th, 2012

 

Ya it possible by using macro

Code
#include<stdio.h>


#define string sum1()


int main(){


 


int k=string;


printf("%d",k);


getch();


return 0;


 


}


sum1()


{


int c=6;


int d=7;


 return(c+d);


}