Calling multiple functions using some generic function call in C

Question

I want to be able to call multiple functions using a single generic function call.

Currently I am trying to implement something like this:

main()
{
    generic();
}

A(){.....};

B(){.....};

C(){.....};

Where I call from main() some generic function, which, in turn, is supposed to be able to call the functions: A(), B(), C().

How can I implement this in C?

Please clarify your question. Do you want generic to always call all of the funtions - or do you want it to call one of the functions based on a parameter? — Cu3PO42
– Cu3PO42, Commented Mar 19, 2014 at 6:58
@HeenaGoyal: There is no constructor in c. But do you have any other way to do it — user3156262
– user3156262, Commented Mar 19, 2014 at 8:11
Yes i want generic to call all functions without specifying there names , something like packet broadcast in computer networks — user3156262
– user3156262, Commented Mar 19, 2014 at 8:12

AravindMS · Accepted Answer · 2014-03-19 06:59:13Z

2

You can do it by using function pointers. Please refer on "how to use function pointers in C"

answered Mar 19, 2014 at 6:59

AravindMS

497 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

user3156262 Over a year ago

i refered that but i could't find the answer.Give me any reference link if you have thanks

AravindMS Over a year ago

please see answer posted by user207064 below. Hope it helps you

user207064 · Accepted Answer · 2014-03-19 07:42:39Z

1

You have to use function pointers as below.

#include<stdio.h>
void A(void);
void B(void);
void C(void);
typedef void (*foo_ptr_t)( void );
foo_ptr_t foo_ptr_array[3]; //fucntion pointers of type foo_ptr_t
main()
{
    int i = 0;
    foo_ptr_array[0] = A; //assign function to each function pointer
    foo_ptr_array[1] = B;
    foo_ptr_array[2] = C;
    for(i = 0; i<3; i++)
        foo_ptr_array[i](); //call functions using function pointer
}

void A()
{
    printf("We are in A\n");
}

void B()
{
    printf("We are in B\n");
}

void C()
{
    printf("We are in C\n");
}

answered Mar 19, 2014 at 7:42

user207064

6655 silver badges14 bronze badges

4 Comments

user3156262 Over a year ago

thanks for answer but i wanted this more dynamic suppose if we dont know function names in project, how to achieve that?.

zoska Over a year ago

if you don't know function names, then how do you want to call them? What DO you know about them then?

user3156262 Over a year ago

ok then suppose if we have function names and other details. i want to check one global variable in main function by all functions in project. But in C always program start from main() i always had to call that function in order to make that function work. how I can make these function automatically check value of global

user3156262 Over a year ago

extern int a=1; main() { a=1; generic();// this is generic call which invokes all fun. } int A(parameters) { if (a==1){ //do something } char B(parameters) { if (a==1){ //do something }

Taryn · Accepted Answer · 2014-03-19 11:28:39Z

0

You can use function pointers, if all functions you want to call have same prototype.

edited Mar 19, 2014 at 11:28

Taryn

249k57 gold badges374 silver badges409 bronze badges

answered Mar 19, 2014 at 7:05

nikhil mehta

1,03216 silver badges32 bronze badges

Collectives™ on Stack Overflow

Calling multiple functions using some generic function call in C

3 Answers 3

2 Comments

4 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

4 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related