Question

我的代码给出：

undefined reference to `NgramTree::generateTree(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int)'
collect2.exe: error: ld returned 1 exit status

错误，我不明白为什么。

这是我的代码示例。

NgramTree.cpp

#include "NgramTree.h"
#include <fstream>
#include <string>
#include <iostream>

using namespace std;


void generateTree(string fileName, int n)
{
    string line;
    string ngram;
    bool isWord = 1;
    bool firstTime = 1;

    ifstream myFile(fileName);

    if (!myFile.is_open())
        return;
...

NgramTree.h

#include <string>
class NgramTree {
    public :

        NgramTree (){ };
        ~NgramTree(){ };

        void addNgram (std::string ngram );
        int getTotalNgramCount ();
        void printNgramFrequencies ();
        bool isComplete ();
        bool isFull ();
        void generateTree(std::string fileName, int n);
};

main.cpp

#include <iostream>
#include <string>
#include <fstream>
#include "NgramTree.h"

using namespace std;

    int main(){

        NgramTree tree;
        tree.generateTree("example.txt", 3);

        return 0;

    }

Answer 1

您需要在cpp文件中添加类名称。编写此代码，以便编译器知道该方法属于哪个类：

void NgramTree::generateTree(string fileName, int n) {
    ...

未定义对“ NgramTree ...”的引用

1 个答案: