在Mac上编译C ++代码 [英] Compiling C++ code on Mac
本文介绍了在Mac上编译C ++代码的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在我的Mac上写非常简单的C ++程序,但我得到错误。我没有很多C ++(和gcc)的经验,网上的简单指南也不讨论这个话题。
I want to write very simple C++ programs on my Mac but I get errors. I don't have a lot of experience with C++ (and gcc) and the simple guides on the web also don't discuss this topic.
请看看我的简单hello世界程序:
Please have a look at my simple hello world program:
erik2:~[03:38 pm]$ cat hw.cpp
#include <iostream>
int main ()
{
cout<<"Hello World!";
return 0;
}
erik2:~[03:38 pm]$ gcc hw.cpp
hw.cpp: In function ‘int main()’:
hw.cpp:5: error: ‘cout’ was not declared in this scope
),我放回(!)命名空间声明,但这不会导致成功,虽然:
Responding to the answers until now (thanks a lot), I put back(!) the namespace declaratation, but that doesn't result in a success, though:
erik2:~[03:51 pm]$ cat hw.cpp
using namespace std;
#include <iostream>
int main ()
{
cout<<"Hello World!";
return 0;
}
erik2:~[03:51 pm]$ gcc hw.cpp
Undefined symbols:
"___gxx_personality_v0", referenced from:
___gxx_personality_v0$non_lazy_ptr in ccphDFtO.o
"std::ios_base::Init::~Init()", referenced from:
___tcf_0 in ccphDFtO.o
"std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)", referenced from:
_main in ccphDFtO.o
"std::ios_base::Init::Init()", referenced from:
__static_initialization_and_destruction_0(int, int)in ccphDFtO.o
"std::cout", referenced from:
__ZSt4cout$non_lazy_ptr in ccphDFtO.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
推荐答案
您需要添加
using namespace std;
或限定您在
std::cout << "Hello, world!";
因此使符号可见(您还要添加换行....)。
so make the symbol visible (and you also want to add a newline....).
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