In function `main':
test.cpp:(.text+0xad): undefined reference to `std::cout'
test.cpp:(.text+0xb2): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(int)'
/tmp/ccWn3jvE.o: In function `__static_initialization_and_destruction_0(int, int)':
test.cpp:(.text+0xda): undefined reference to `std::ios_base::Init::Init()'
test.cpp:(.text+0xdf): undefined reference to `std::ios_base::Init::~Init()'
collect2: выполнение ld завершилось с кодом возврата 1