#include <iostream>

using namespace std;

//g++ PassByValue.cpp && ./a.out

class emp{

public:

char name;

emp(char nameParam){

name=nameParam;

}

void setName(char nameParam){

name=nameParam;

}

char toString(){

return name;

}

};

void foo(emp a,emp b){

a.setName('1');

b= emp('2');

}

void fooRef(emp &a,emp &b){

a.setName('1');

b= emp('2');

}

int main()

{

emp a('a');

emp b('b');

foo(a,b);

cout << "after passbyVal a = " << a.toString() << " b = " << b.toString() << "\n";

fooRef(a,b);

cout << "after passByRef a = " << a.toString() << " b = " << b.toString() << "\n";

}