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#include <iostream>
using namespace std;
void LevelOrderTraverse(node * root)
{
 if(root == NULL)
 return;
 queue<node*> qTree ;
 qTree.push(root);
 
while(qTree.size() > 0)
 {
node * prevNode = NULL ;
 int nSize = qTree.size();
 for(int nIndex = 0 ; nIndex < nSize ; nIndex++)
 {
node* temp= qTree.front();
 qTree.pop();
 
if(!temp) continue;
 if(prevNode) { prevNode->nextRight = temp; }
 prevNode = temp ;
 if(temp->left) 
 qTree.push(temp->left);
 if(temp->right)
 qTree.push(temp->right);
 }
 }
}
 
int main() {
	// your code goes here
	return 0;
}

prog.cpp:3:25: error: variable or field ‘LevelOrderTraverse’ declared void
 void LevelOrderTraverse(node * root)
                         ^
prog.cpp:3:25: error: ‘node’ was not declared in this scope
prog.cpp:3:32: error: ‘root’ was not declared in this scope
 void LevelOrderTraverse(node * root)
                                ^

Standard output is empty