“未定义对”的引用在G ++ Cpp [英] "undefined reference to" in G++ Cpp
本文介绍了“未定义对”的引用在G ++ Cpp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
似乎无法让错误消失。错误如下。我已经看了google,仍然不能弄清楚。它不像我是新的Cpp,但没有蠢了它在一段时间。
Can't seem to get the errors to go away. Errors are below. I have looked on google and still can't figure it out. It is not like I am new to Cpp, but have not fooled with it in a while.
很奇怪的是它与G ++在Windows中的工作...
错误:
- [ze @ fed0r! - - - ** _ _ *] $ g ++ main.cpp
- /tmp/ccJL2ZHE.o: ':
- main.cpp :( .text + 0x11):未定义引用`Help :: Help()'
- main.cpp: (.text + 0x1e):未定义引用`Help :: sayName()'
- main.cpp :(。 )'
- main.cpp :( .text + 0x46):未定义引用`Help ::〜Help()'
- collect2:ld返回1个退出状态
- [ze@fed0r! ---**__*]$ g++ main.cpp
- /tmp/ccJL2ZHE.o: In function `main':
- main.cpp:(.text+0x11): undefined reference to `Help::Help()'
- main.cpp:(.text+0x1d): undefined reference to `Help::sayName()'
- main.cpp:(.text+0x2e): undefined reference to `Help::~Help()'
- main.cpp:(.text+0x46): undefined reference to `Help::~Help()'
- collect2: ld returned 1 exit status
main.cpp
#include <iostream>
#include "Help.h"
using namespace std;
int main () {
Help h;
h.sayName();
// ***
// ***
// ***
return 0;
}
Help.h
#ifndef HELP_H
#define HELP_H
class Help {
public:
Help();
~Help();
void sayName();
protected:
private:
};
#endif // HELP_H
Help.cpp
#include <iostream>
#include "Help.h"
using namespace std;
Help::Help() { // Constructor
}
Help::~Help() { // Destructor
}
void Help::sayName() {
cout << " ***************" << endl;
cout << " ************************************" << endl;
cout << " ************" << endl;
cout << " *********************" << endl;
}
推荐答案
g ++ main.cpp帮助。 cpp
g++ main.cpp Help.cpp
您必须告诉编译器所有要编译的文件,而不仅仅是第一个。
You have to tell the compiler all the files that you want it to compile, not just the first one.
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