C++ Hello World体系结构x86_64的未定义符号:

Question

应该是直截了当的,但是当我编译C++ Hello World代码时,会返回一堆未定义的符号错误.

// my first program in C++
#include <iostream>
using namespace std;

int main ()
{
  cout << "Hello World!";
  return 0;
}

下面是我如何编译:打开终端,cd到目录,gcc hello.cpp

然后我得到了错误.有什么想法吗？我觉得我可能已经打破了某些......或者我只是遗漏了一些非常明显的东西.任何帮助是极大的赞赏!

继承人的错误:

Undefined symbols for architecture x86_64:
"std::cout", referenced from:
      _main in ccfUAf5i.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 ccfUAf5i.o
  "std::ios_base::Init::Init()", referenced from:
      __static_initialization_and_destruction_0(int, int)in ccfUAf5i.o
  "std::ios_base::Init::~Init()", referenced from:
      ___tcf_0 in ccfUAf5i.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

Answer 1

您需要使用g++编译和链接C++代码:

g++ hello.cpp -o hello

或完全符合Stack Overflow标准:

g++ -W -Wall -Werror -pedantic -o hello hello.cpp