C++ 我不断收到 "was not declared in this scope error"

Question

所以，我有一个头文件和一个类文件。但是当我编译 puzzle.cpp 时，我总是得到 get_solution was not declared in this scope。我不明白为什么会发生该错误，因为它在同一个类中，所以我可以在同一个类中调用任何函数。谁能帮我解决这个问题？谢谢!

puzzle.h

#ifndef PUZZLE_H
#define PUZZLE_H

#include<iostream>
#include <string>
#include <vector>

class puzzle{
private:
    std::string _solution;
    std::vector<bool> _guesses;
public:
    puzzle(std::string solution);
    std::string get_solution(){return _solution;}
    bool guess(char c);
    bool solve(std::string proposed_solution);
    std::string to_string();
};

#endif

拼图.cpp

#include <iostream>
#include "puzzle.h"
#include <string>
#include <vector>

using namespace std;

puzzle::puzzle(std::string solution) {
    _solution = solution;
   for(int i = 0; i < 256; i++)
      _guesses.push_back(false);
}

bool puzzle::guess(char c){
    int num = c;
    if(c<='z' || c>='a')
        if(_guesses.at(c) == false){
          _guesses.at(c) == true;
           return true;
       }
    return false;
}

bool solve(string proposed_solution){
    string test = get_solution();
    if(proposed_solution.compare(test) == 0)
       return true;
    return false;
}

string to_string(){
   int len = get_solution().length();
   return "";
}

Answer 1

看起来你忘了制作 solve 和 to_string 成员函数:

改变

string to_string(){ ...
bool solve(string proposed_solution){ ...
    ^^^

到

string puzzle::to_string(){ ...
bool puzzle::solve(string proposed_solution){ ...