C++ multilevel inheritance - c++

Question

I have made a program where there are three classes, each one inherits from one another but when I try to make a derived class function, the cout gives me an error such as this
3 IntelliSense: no suitable user-defined conversion from "std::basic_ostream<char, std::char_traits<char>>" to "std::string" exists e:\Visual Studio Projects\test\test\Source.cpp 19 10 test
What am I suppose to change and what would be the solution. Also if your could point out my mistake that would be nice
#include<iostream>
#include <string>
std::string name;
class Base{
public:
void getRed(){
std::cout << "Your name is : " << name << std::endl;
}
};
class Boy:public Base{
public:
Boy(){
name = "john";
}
std::string newInf(){
return std::cout << "Boy2 name is: " << name << std::endl;
}
};
class Boy2: public Boy{
public:
Boy2(){
name = "Mike";
}
};
int main(){
Boy boy;
boy.getRed();
Boy2 boy2;
boy2.newInf();
system("pause");
return 0;
}

Answer 1

Your compile error is not related to multilevel inheritance.
std::string newInf(){
return std::cout << "Boy2 name is: " << name << std::endl;
}
This is wrong. std::cout << "Boy2 name is: " << name << std::endl is, well... a kind of std::basic_ostream & and you cannot convert it into std::string.
This should be OK, just like you wrote getRed().
void newInf(){
std::cout << "Boy2 name is: " << name << std::endl;
}

Answer 2

you defined newInf() as a function that returns std::string,
where you are actually returning std::cout which is ostream .
so in run time it tries to convert ostream to string, and fails, that's why you get the message:
no suitable user-defined conversion from "std::basic_ostream>" to "std::string" exists