Question

我一直在浏览StackOverflow，看起来尽管很多其他人遇到过与我类似的问题，但我似乎无法弄清楚我的问题是什么。

这是我第一次使用c ++。赋值是创建一个简单的向量类，分为3个文件。它也必须打包在命名空间中。

我的问题是，当我在终端中运行g++ -o test e_main.cpp时，我收到错误：

Undefined symbols for architecture x86_64:
  "e_vector::MyVector::add(e_vector::MyVector)", referenced from:
      _main in e_main-eb4076.o
  "e_vector::MyVector::norm()", referenced from:
      _main in e_main-eb4076.o
  "e_vector::MyVector::print()", referenced from:
      _main in e_main-eb4076.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

这是我的＆＃34; e_vector.h＆＃34;文件：

namespace e_vector { 
  class MyVector {
  public:
    double x; // The X-component of vector
    double y; // The Y-component of vector
    double z; // The Z-component of vector
    double norm(); 
    void print(); 
    MyVector add(MyVector u); 
  };
}

这是我的＆＃39; functions.cpp＆＃39;文件：

#include <iostream>
#include <cmath>
#include <string>
#include "e_vector.h"
using namespace std;
using namespace e_vector;

double e_vector::MyVector::norm() {
    return (sqrt(x * x * y * y * z * z));
}

void e_vector::MyVector::print() {
    cout << "(" << x << "," << y << "," << z << ")";
}

MyVector e_vector::MyVector::add(MyVector u) {
    MyVector w; 
    w.x = x + u.x; 
    w.y = y + u.y;
    w.z = z + u.z;
    return w;
}

最后，这是我的＆＃34; e_main.cpp＆＃34;：

#include <iostream>
#include <cmath>
#include <string>
#include "e_vector.h"
using namespace std;
using namespace e_vector;

int main() {
    MyVector v1 = {1.0, 1.0, 1.0}; 
    MyVector v2 = {1.0, 0.0, 0.0};
    MyVector v3;

    cout << " norm of v1 = " << v1.norm(); // Test norm method
    cout << " v1 = " ; 
    v1.print() ; // Test print method

    cout << " v2 = " ; 
    v2.print() ;

    v3 = v1.add(v2) ; // Test the add method
    cout << " v3 = "; 
    v3.print();

    return 0;
}

我是否可能错误地将文件链接在一起？如果这显然很明显，请提前感谢，对不起！

＆＃34;架构x86_64的未定义符号：＆＃34; C ++

0 个答案: