I need help with these problems! please help
#include <iostream>
#include <fstream>
#include <string>
#include “Container.h”
#include “Book.h”
#include “Buy.h”
using namespace std;
// forward declarations
void flush();
void branching(char);
void helper(char);
void add_book(string, string, float);
void change_price(Book *);
Book* search_book(string,string);
void remove_book(string,string);
void print_all(Container*);
Container* list = NULL; // global list
int main()
{
char ch = ‘i’;
do {
cout << “Please enter your selectionn”;
cout << “ta: add a new book to the listn”;
cout << “tc: change the price of a bookn”;
cout << “tb: buy a bookn”;
cout << “tr: remove a book from the listn”;
cout << “tp: print all books on the listn”;
cout << “tq: quitn”;
cin >> ch;
flush();
branching(ch);
} while (ch != ‘q’);
list = NULL;
return 0;
}
void flush()
{
int c;
do c = getchar();
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