How do I call this function in my client file?

How do I call this function: void InorderTrnaverse(node *leaf); in my client file?
I am not getting the syntax correct.

#include<iostream>
#include<iomanip>
#include<fstream>
#include <cctype> // defines isalpha() function

#include"TreeImplementation.cpp"

using namespace std;


int main()
{

node structnode;

btree bt;
int num=0;
char chr;
int count=0;
int *leaf;

ifstream fin("input.txt");
ofstream fout("output1.txt");

fin>>num;
fin>>chr;
while(fin)
{
bt.insert(num);
bt.search(num);
bt.InorderTrnaverse(num);
fout<<num;
count++;
fout<<"Step: "<<count<<" "<<"Data Value = "<<num<<" "<<"Activity Signal = "<<chr<<endl;


fout<<"Preorder Transversal = "<<endl<<endl;
fout<<"Inorder Transversal = "<<endl<<endl;
fout<<"Post order Transversal = "<<endl<<endl;
fout<<"Level by Level Transversal = "<<endl<<endl;
fout<<"Total Number of nodes = "<<count<<endl<<endl;

fin>>num;
fin>>chr;
}


return 0;
}

Function

void btree::InorderTrnaverse(node *leaf)
{

if(leaf != NULL)
InorderTrnaverse(LChild(leaf));
cout<<leaf;
InorderTrnaverse(RChild(leaf));
}

header

struct node
{
int key_value;
node *left;
node *right;
};


class btree
{
public:
// node *root;
btree();
// ~btree();
void destroy_tree(node *leaf);
void insert(int key, node *leaf);
node *search(int key, node *leaf);
//public:
void insert(int key);
node *search(int key);
//void destroy_tree();
void InorderTrnaverse(node *leaf);
private:
node *root;
};
node *RChild(node *leaf);
node *LChild(node *leaf);

You need a btree object (or a pointer or a reference) and a node object for an attribute.


btree BinTree;
BinTree.InorderTrnaverse(new node()) ;

...for example

Sould I uste the inserrt function? void insert(int key, node *leaf);

bt.InorderTranverse(void insert(int key, node *leaf));

No, but you could do something similar to your insert routine by creatiing a InorderTranverse function that takes no arguments that passes the root to your other InorderTranverse function (that takes a node as an argument). This way it could be called recursively. You could also make this second InorderTranverse function private as it's not going to be called directly.

You may also want to make a header file...its just a lil cleaner code pratice.