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I try to compile this cpp code on osx lion but I get an error. #include <iostream> using namespace std; int main (int argc, char *argv[]) { for(int i = 0; i < 10; i++) { cout << "hi"; cout << endl; } return 0; } To compile: cc main.cpp Error: Undefined symbols for architecture x86_64: "std::cout", referenced from: _main in ccBdbc76.o "std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)", referenced from: _main in ccBdbc76.o "std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)", referenced from: _main in ccBdbc76.o "std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))", referenced from: _main in ccBdbc76.o "std::ios_base::Init::Init()", referenced from: __static_initialization_and_destruction_0(int, int)in ccBdbc76.o "std::ios_base::Init::~Init()", referenced from: ___tcf_0 in ccBdbc76.o ld: symbol(s) not found for architecture x86_64 collect2: ld returned 1 exit status

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