c++ - Why does using my print method with std::cout result in an error? - 


#include <iostream>  using namespace std;  class fam {     public:         char you, urmom, urdad;         void addperson(char y, char m, char f)         {             = y;             urmom = m;             urdad = f;         } };  class tree: public fam {     public:         void showfamtree()         {             cout<< "name: " << << endl;             cout<< "mother's name: " << urmom <<endl;             cout<< "father's name: " << urdad <<endl;         } };  int main(void) {     tree tree;      char a,b,c;     cin >> a;     cin >> b;     cin >> c;      tree.addperson(a,b,c);      cout<< "family tree: " << tree.showfamtree() <<endl;      return 0;     }

i wanted print family tree person's name, mother's name, father's name when compile it, following error:

invalid operands binary expression (basic_ostream<char, std::char_traits<char> > , void)

tree.showfamtree() returns nothing (i.e. void), doesn't make sense try pass std::cout. might change

cout<< "family tree: " << tree.showfamtree() <<endl;

to

cout << "family tree: " << endl; tree.showfamtree();

-

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