Question

为“Mastermind”游戏编写程序。在我的一个类代码中，我将它分成了.h和.cpp文件，我不知道为什么我的cpp文件在编译时不断给我这个错误：错误：'int code :: getVector（）'的原型与'code'中的任何类都不匹配

据我所知，我在code.h文件中有getVector（）的正确标题：

#include <vector>
#include <iostream>

#ifndef CODE_H
#define CODE_H

using namespace std;

class code      //strores code vector and checks for correct and incorrect numbers
{
private:

    vector<int> codeVector {0,0,0,0};       //vector storing code (guess and secret code depending on object)

public:

    vector<int> getVector();        //retrievs private codeVector

    void setCodeVectorToGuess(vector<int> guess);   //sets private codeVector to vector passed in

    void setCodeVectorToSecretCode();   //uses rand function to set random secret code vector

    int checkCorrect(code guessObject);     //uses for loop to check what values are correct number correct location by checking equivalence at each vector index

    int checkIncorrect(code guessObject);   //checks numbers between the two vectors using two for loops which each replace values in the vectors with non-equivalent out-of-range numbers

};

#endif // CODE_H

和我的.cpp文件中的正确语法：

#include <iostream>
#include <vector>
#include <stdio.h>
#include <stdlib.h> 
#include <time.h>

#include "code.h"

using namespace std;



//code :: codeVector = {0,0,0,0};

code :: getVector()     //retrieves private codeVector
{
    return codeVector;
}

code :: setCodeVectorToGuess(vector<int> guess) //sets private codeVector to vector passed in
{
    codeVector = guess;
}

code :: setCodeVectorToSecretCode() //uses rand function to set random secret code vector
{
    srand (time(NULL));
    codeVector = {rand() % 5 + 1, rand() % 5 + 1, rand() % 5 + 1, rand() % 5 + 1};
}

code :: checkCorrect(code guessObject)      //uses simple for loop to check what values are correct number correct location
{
    int correctPlaceCorrectNum = 0;

    vector<int> guessVector;
    guessVector = guessObject.getVector();

    for (int o=0; o<codeVector.size(); o++)
    {
        if (codeVector[o] == guessVector[o])
        {
            correctPlaceCorrectNum ++;
        }
    }

    return correctPlaceCorrectNum;
}

code :: checkIncorrect(code guessObject)    //checks numbers between the two vectors using two for loops which each replace values in the vectors with non-equivalent out-of-range numbers
{
    int incorrectPlaceCorrectNum = 0;
    int counter(0), counter2(0);

    int array1[8] = {6,7,8,9};          //two arrays used for the elimination of vector values by substitution of non-equivalent values
    int array2[8] = {10,11,12,13};      //

    vector<int> secretCodeVector {0,0,0,0};     //copy of secret code vector
    secretCodeVector = getVector();

    vector<int> guessVector {0,0,0,0};          //copy of guess vector
    guessVector = guessObject.getVector();

    for (int u=0; u<secretCodeVector.size(); u++)       //checks and replaces all correct number correct location values in secret code vector
    {
        if (secretCodeVector[u] == guessVector[u])
        {

            secretCodeVector[u] = array1[counter];

            counter++;

        }
    }

    for (int i=0; i<secretCodeVector.size(); i++)       //checks and replaces all correct number incorrect location values in both vectors
    {

        for (int l=0; l<secretCodeVector.size(); l++)           //checks each digit of secret code with all digits of guess code
        {
            if (secretCodeVector[i] == guessVector[l])  
            {
                secretCodeVector[i] = array1[counter];
                guessVector[l] = array2[counter2];


                incorrectPlaceCorrectNum++;

                counter++;
                counter2++;
                break;
            }
        }

    }

    return incorrectPlaceCorrectNum;

}

Answer 1

问题是.h文件中的函数声明和.cpp文件中的定义不匹配：在.h文件中声明：

vector<int> code::getVector()

并在.cpp文件中：

code::getVector()

问题在于它们不匹配，但它们必须匹配。写

vector<int> code::getVector()
{
    // code here 
}

同样适用于所有其他定义。

在古代，没有返回类型意味着返回类型是int，这解释了您观察到的错误消息。但这已经被禁止了很长时间，应该发出警告。

分离为.h和.cpp文件时，“prototype与任何类都不匹配”错误

1 个答案: