Question

我不确定为什么我一直收到这个错误。我实际上是根据我的朋友检查我的代码，但我无法理解为什么我的代码在他的代码中没有收到错误。尽管错误消息几乎是不可读的，但似乎它在process.h，我的显示功能或我的＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;操作

// cstring.h

#define _CRT_SECURE_NO_WARNINGS
#ifndef _CSTRING_H_
#define _CSTRING_H_

#include <iostream>
#include <cstring>
#define MAX 5

namespace w1 {
    class Cstring {
        char* stored;
    public:
        Cstring();
        Cstring(char* str);
        void display(std::ostream& os) const;

    };
}
std::ostream& operator<<(std::ostream& os, const w1::Cstring& ss);
#endif

// cstring.cpp

#include "cstring.h"
#include <iostream>
#define _CRT_SECURE_NO_WARNINGS
using w1::Cstring;

int max = MAX;

namespace w1{

    Cstring::Cstring() {
        stored = nullptr;
    }

    Cstring::Cstring(char* s) {
        if (s != nullptr) {
            stored = new char[MAX + 1];
            strncpy(stored, s, MAX);
        }
        else {
            *this = Cstring();
        }
    }


    void Cstring::display(std::ostream& os) const {
        static int counting = 0;
        os << counting++ << ": " << stored << std::endl;
    }

    std::ostream& operator<<(std::ostream& os, const w1::Cstring& ss) {
        ss.display(os);
        return os;
    }

}

// process.h

#include "cstring.h"

void process(char* st);

// process.cpp

#include "process.h"
#include "cstring.h"


void process(char* st) {
    w1::Cstring first(st);
    std::cout << first << std::endl;

}

// main.cpp中

#include "cstring.h"
#include "process.h"


int main(int argc, char *argv[]) {
    int i;
    std::cout << "Command Line: ";
    for (i = 0; i < argc; i++) {
        std::cout << argv[i] << " ";
    }
    std::cout << std::endl;
    if (argc > 1) {
        std::cout << "Maximum number of characters stored: " << MAX << std::endl;
        for (int n = 1; n < argc; n++) {
            process(argv[i]);
        }
    }
    else {
        std::cerr << "Insufficient number of arguments (min 1)" << std::endl;
    }
}

错误消息是这样的：

错误1错误LNK2019：未解析的外部符号＆＃34;类   std :: basic_ostream＆gt; ＆安培; __cdecl   运算符＆lt;＆lt;（class std :: basic_ostream


＆amp;，类w1 :: Cstring const＆amp;）＆＃34; （?? 6 @ YAAAV？$ basic_ostream @ DU？$ char_traits @ d @ STD @@@ STD @@ @ AAV01 @ ABVCstring W1 @@@ Z）     在函数中引用＆＃34; void __cdecl process（char *）＆＃34;     （？process @@ YAXPAD @ Z）C：\ Users \ Chidi \ Documents \ Visual Studio     2013 \ Projects \ workshop1 \ workshop1 \ process.obj workshop1

为什么我收到此LNK2019错误？

0 个答案: