对于我的Caesar密码项目，未定义对`Caesar :: Caesarint'的引用

问题描述

我写了一个.cpp文件来加密和解密传递给它的字符串。我遇到的问题是，除非在test.cpp文件中包含Caesar.cpp文件（我的解决方案），否则测试文件会产生未定义的引用错误。当我确实将Caesar.cpp文件作为#include“ Caesar.cpp”包含在TestCaesar.cpp文件中时，测试运行完美。我在Windows上的GCC上使用Visual Studio Code作为编译器。我无法编辑有关头文件的任何内容（分配的一部分），但是我将添加该内容以及我在本文中提到的其他文件。 我的头文件：

// include file for Caesar cipher code
//
        
#ifndef CAESAR_H
#define CAESAR_H

#include <string>
        
class Caesar {

private:
    //pointers used to refer to the standard alphabet array and the Caesar shift array
    char* std_alphabet;
    char* c_alphabet;

public:
    // The constructor . . . 
    // create the two arrays with the c_alphabet array contents representing the std_alphabet 
    // characters shifted by a value of the shift parameter
    Caesar(int shift = 0);

    // encrypt a message. Returns count of characters processed
    // first string is message,second is encrypted string
    int encrypt(const std::string& message,std::string& emessage);

    // decrypt a message. Returns count of characters processed
    // first string is encrypted string,second is decrypted string
    int decrypt(const std::string& message,std::string& dmessage);

    //delete any memory resources used by the class
    ~Caesar();

}; // end of class . . .
#endif

我的Caesar.cpp文件：

#include "Caesar.h"    // provides Caesar

#include <string>
                        
Caesar::Caesar(int shift)   // constructor
{ 
    const std::string alpha1("abcdefghijklmnopqrstuvwxyz");    // assign full alphabet
    std_alphabet = new char[26];    // allocate char array storage to std_alphabet
    c_alphabet = new char[26];    // allocate char array storage to c_alphabet

    for (int i = 0; i < 26; i++)    // iterate from 0 to 25
    {
        std_alphabet[i] = alpha1[i];    // assign the alphabet to the std_alphabet array
        c_alphabet[i] = char(int(alpha1[i] + shift - 97) % 26 + 97);    // assign the shifted alphabet to c_alphabet
    }
}

Caesar::~Caesar()   // destructor
{
    delete[] std_alphabet;    // deletes the created array std_alphabet
    delete[] c_alphabet;    // deletes the created array c_alphabet
}
                    
int Caesar::encrypt(const std::string& message,std::string& emessage)  // encrypts the encrypted message and assigns it to emessage
{
    int convertLetters = 0;    // initialize count of converted letters to 0

    for (int i = 0; i < message.length(); i++)    // iterate the length (number of characters) of the message minus one
    {
        if (isalpha(message[i])){    // check if the character is alphabetic
            char c1 = tolower(message[i]);    // assign the lowercase version of the character to a variable
        
            for (int j=0; j < 26; j++)    // iterate from 0 to 25
            {
                if (c1 == std_alphabet[j])    // check if the assigned variable matches the letter of the alphabet corresponding with the current value of j
                {
                    emessage[i] = c_alphabet[j];    // assign the matched letter to a position in the emessage array,encrypting that letter
                }
            } 
            convertLetters++;   // iterate the number of converted letters
        }
        else    // if the character is not alphabetic,this else statement runs
        {
            emessage[i] += message[i];    // assigns non-alphabetic characters to the emessage array
        }
    }
    return convertLetters;    // returns the number of converted letters
}

int Caesar::decrypt(const std::string& message,std::string& dmessage)  // decrypts the encrypted message and assigns it to dmessage
{
    int convertLetters = 0;    // initialize count of converted letters to 0

    for (int i = 0; i < message.length(); i++)    // iterate the length (number of characters) of the message minus one
    {
        if (isalpha(message[i]))    // check if the character is alphabetic
        {
            char c2 = tolower(message[i]);    // assign the lowercase version of the character to a variable
            int j = 0;    // initializes the variable j to 0

            while (c2 != c_alphabet[j])   // checks if the c2 variable is not equal to letters of the shifted alphabet,if it is equal,then that is the value of the decrypted letter in the other alphabet
            {
                j++;    // iterates j
            }
            dmessage[i] = std_alphabet[j];    // assigns the decrypted letter to the dmessage array
            convertLetters++;    // iterates the number of converted letters
        }
        else    // if the character is not alphabetic,this else statement runs
        {
            dmessage[i] = message[i];    // assigns non-alphabetic characters to the dmessage array
        }
        
    }
    return convertLetters;    // returns the number of converted letters
}

我的TestCaesar.cpp文件：

#include "Caesar.h"

#include <iostream>
#include <string>

int main()
{
    Caesar c1(1);
    Caesar c2(2);
    Caesar c3(3);
    Caesar c4(4);
    Caesar c5(5);
    Caesar c6(6);
    Caesar c7(7);
    Caesar c8(8);
    Caesar c9(9);
    Caesar c10(10);
    
    std::string j = " ",k = " ",l = " ",m = "";

    std::cout << c1.encrypt("Have",j);
    std::cout << " " << std::endl;
    for (int n = 0; n < 4; n++)
    {
        std::cout << j[n];
    }
    std::cout << " " << std::endl;
    std::cout << c2.decrypt("Have a day!",k);
    std::cout << " " << std::endl;
    for (int o = 0; o < 11; o++)
    {
        std::cout << k[o];
    }
    std::cout << " " << std::endl;
    std::cout << c3.encrypt("Going well",l);
    std::cout << " " << std::endl;
    for (int p = 0; p < 10; p++)
    {
        std::cout << l[p];
    }
    std::cout << " " << std::endl;
    std::cout << c10.encrypt("Going well",m);
    std::cout << " " << std::endl;
    for (int q = 0; q < 10; q++)
    {
        std::cout << m[q];
    }
    std::cout << " " << std::endl;
}

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@）