What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
class B
{
	int b;
     public:
	B(){}
	B(int i){
		b = i;
	}
	int show(){
		return b;
	}
};
 
class C
{
	B b;
     public:
	C(int i){
		b = B(i);
	}
	friend void show();
};
 
void show()
{
	C c(10);
	cout<<"value of b is: "<<c.b.show()<<endl;
}
 
int main(int argc, char const *argv[])
{
	show();
	return 0;
}