Thread: Calling init function through main in C

Originally Posted by mike65535

Goodness, where did this code come from?

You don't need to identify or call functions with "func" (as it seems perhaps you believe?)

If you are having trouble understanding function calls, you really need to learn about it, and then try a simple example. Leave out the pointers and all that. If you can't get that to work, post it!

Code:

#include <iostream>
using namespace std;


#define maxinstant 1

#define this_error_code 2
void func1(input1)
{
    return 1;
    
}
void func2(input1)


{
    return 0;
}


bool_t func( Dip* req )
{
    bool_t response = true;
 
    if ( req->inst > maxinstant )
    {
        req->errorCode = this_error_code;
    }
    else if ( req->inst == 0 )
    {
      response = func1( req );
    }
    else
    {
        Response = func2( req );
    }
 
    return ( response);
}


 int main()
 {
  func(1);
 return 0;
 }

this is another questions i created this as a test for myself to learn function call
i was wondering if you can help me call function func in main?

Originally Posted by amahmoo

I know but i dont know how to pass variable through it

I have already shown you several times in this thread. Maybe you should work with a simpler example:

Code:

#include <stdio.h>

void foo(int n)
{
    printf("%d\n", n);
}

int main(void)
{
    int x = 123;
    /* insert function call here */
    return 0;
}

Replace the comment with a call to foo with x as the argument.

Originally Posted by amahmoo

i know this i just want to be able to know how pass varaible that would change value for req
so i can run it three time with three different returns

Then you need to figure out what does the function do, and thereby deduce what the Di (or Dip, or whatever) object should be. I mean, you cannot just throw some arbitrary function, provide insufficient information, and then expect to be spoonfed the answer. If you are unable to understand the function, simplify.

EDIT:

Code:

#include <iostream>
using namespace std;

This is C++. Stop. Stop getting random code snippets from the Internet and then try to understand them. You have no clue. No !@#$ing clue. Go get yourself a proper introductory book and learn C programming in a structured way. I don't care if you claim to know how to do what I challenged you to do: until I have further proof, you know nothing.

What does the function do? Give a summary and also describe line by line.