Help needed calling C function using variable name

[raghunadhs]

Hi All,
I have 100 functions which have similar name but different in last few characters. for example, void get_fun1(void), void get_fun2(void), void get_fun3(void), ..........etc void get_fun100(void).


Now i want to call those functions with a single variable dynamically. I can say like, i will get some number from some other module. If i get the value as 3 from that other module, i should call that function as get_fun3().

So i need a generic "function calling" statement to invoke any one of the function out of hundred.

i came to know that there is a methodology like .....

#define get(x) get_##x()
void get_1()
{
printf("\nOne");
}
void get_2()
{
printf("\nTwo");
}
void main()
{
int i;
scanf("%d",&i);
get(1);
}

If i pass the static values (1,5,8...) to the get() function in the above code, it is working good. Suppose if i pass the value as a variables (i), it is not working.

Can any one suggest me how to solve this issue?

Thanks in advance,
Raghunadhs

[wossname]

Just use an array of function pointers. That way you needn't mess around with all that messy scanf() stuff...

#include "stdio.h"

void func_0()
{
  printf("this is func_0()\n");
}

void func_1()
{
  printf("this is func_1()\n");
}

void func_2()
{
  printf("this is func_2()\n");
}


typedef void (*pfunc)(); //function pointer data type definition

int main(int argc, char** argv)
{
  //declare an array of function pointers (you can use macros for this if you like)
  pfunc functions[3] = { func_0, func_1, func_2 };

  //declare the integer that chooses what function gets called...
  int funcNumber = 0;

  functions[funcNumber++](); //0
  functions[funcNumber++](); //1
  functions[funcNumber++](); //2


  return 0;
}

[raghunadhs]

Thank you very much wossname, it helped me a lot.

[wossname]

You are most welcome.