Retroactive function

[std10093]

I have a function in a BST.

void fuc(...)
{
    int flag;
    flag=0;
    if(terminating_condition)
    {.....}
    if(...)
    {
       flag=1;
       fuc(...);
     }
     if(flag==1) do_something;
}

The problem is that because fuc calls herself flag is going to be always 0.I want to do_something everytime i call her,except first time i call her.No global and etc variables are allowed for me.I cannot add more arguments to fuc.

[Bayint Naung]

You want static variable?

[CommonTater]

Forgive my ignorance but ... wtf is a BST?

[tabstop]

BST = binary search tree.

If you don't like the static variable approach, there's always writing a second function to do the real work.

void func() {
    func_that_does_the_real_work(0);
}

void func_that_does_the_real_work(int flag) {
    ... real work
}

[CommonTater]

BST = binary search tree.

Ahhh... thanks. Yet another silly acronym for my collection

[std10093]

BST = binary search tree.

If you don't like the static variable approach, there's always writing a second function to do the real work.

void func() {
    func_that_does_the_real_work(0);
}

void func_that_does_the_real_work(int flag) {
    ... real work
}

I did not understand you. :/

[std10093]

You want static variable?

Probaply i am forced to.However how is this going to work.I kave to initialize this static variable in my function.I want it to be used like a counter.But i write i=0; then everytime my function call herself the initialization is going to take place again.

[quzah]

void foo( void )
{
    static int bar = 1;
    printf( "bar is: %d\n", bar );
    if( bar )
        bar = 0;
}

You could always throw a quick piece of code together and see how it works.


Quzah.

[std10093]

void foo( void )
{
    static int bar = 1;
    printf( "bar is: %d\n", bar );
    if( bar )
        bar = 0;
}

You could always throw a quick piece of code together and see how it works.


Quzah.

Understood

[rags_to_riches]

Going forward you should note that this is a recursive function, not a retroactive function. Knowing this may help you in future searches.

[brewbuck]

The problem is that because fuc calls herself flag is going to be always 0.I want to do_something everytime i call her,except first time i call her.No global and etc variables are allowed for me.I cannot add more arguments to fuc.

Then the problem is incorrectly specified. If you can't use a global and you can't add a parameter, the only thing left is to make a copy of this function which is used for the first level of recursion, then it calls the other function for the other levels. Which of course is stupid, but they teach you to be stupid in school, so no surprise there.