Question

我得到这些错误，因为我无法将const char *正确转换为std :: string ....

包含在./../Header Files / MainGame.h：5：0中的文件中，来自./MainGame.cpp:2, 来自main.cpp：1：./../ Header Files /../源文件/ Hangman.cpp：在成员函数中'void Hangman :: checkIfItEquals（std :: string）'：./../Header Files /../ Source Files / Hangman.cpp:55:41：错误：从'char'转换为无效 'const char *'[-fpermissive] std :: string charStr = string（ it） ^在/usr/include/c++/4.8/string:52:0中包含的文件中，来自/usr/include/c++/4.8/bits/locale_classes.h:40，来自/usr/include/c++/4.8/bits/ios_base.h:41，来自/usr/include/c++/4.8/ios:42，来自/usr/include/c++/4.8/ostream:38，来自/usr/include/c++/4.8/iostream:39，来自./../Header Files / MainGame.h：2，来自./MainGame.cpp:2, 来自main.cpp：1：/usr/include/c++/4.8/bits/basic_string.h:490:7：错误：初始化 'std :: basic_string＆lt; _CharT，_Traits的参数1， _Alloc＆gt; :: basic_string（const _CharT ，const _Alloc＆amp;）[with _CharT = char; _Traits = std :: char_traits; _Alloc = std :: allocator]'[-fpermissive] basic_string（const _CharT * __，const _Alloc＆amp; __a = _Alloc（））; ^在./../Header Files / MainGame.h：5：0中包含的文件中，来自./MainGame.cpp:2, 来自main.cpp：1：./../Header Files /../源文件/ Hangman.cpp：56：9：错误：预期'，'或';'在'if'之前 if（guessLet.compare（charStr）== 0） ^

这是代码....如果其他代码与问题有任何关系，我会全力以赴。

Hangman.cpp：

#include<vector>
#include "../Header Files/Hangman.h"

Hangman::Hangman()
{
}

void Hangman::run()
{
    this -> mainGame();
    this -> mainGameLoop();
}


void Hangman::mainGame()
{
    dictonary.init();
    randomString = dictonary.randomItem();
    cout << "RANDOM STRING : " << randomString << endl;
    stringToVec();
}

void Hangman::stringToVec()
{
    for(std::string::iterator it = randomString.begin(); it != randomString.end(); ++it) 
    {
        randStringVec.push_back(*it);
    }
}


void Hangman::mainGameLoop()
{
    try{
         cout << " \n Guess A Letter (MUST BE A LETTER OR EXIT) \n";
         std::cin >> userGuessLetter;
         if(userGuessLetter.length() > 1)
             throw "Too Big Of a letter";
    } 
    catch(const char* exc)
    {
       if(true)
       {
          exit(1);
       }
    }

    cout << "You typed " << userGuessLetter << endl;
}

void Hangman::checkIfItEquals(string guessLet)
{
    for(std::vector<char>::iterator it = randStringVec.begin(); it!=randStringVec.end(); it++)
    {
        std::string charStr = string(*it)
        if(guessLet.compare(charStr) == 0)
        {
            cout << "GOOD JOB.. THERE IS A SIMMILAR LETTER!" << endl;
            break;
        }
    }
}


Hangman::~Hangman()
{
}

Hangman.h：

#pragma once
#include<iostream>
#include<string>
#include<vector>
#include "../Source Files/Drawer.cpp"
#include "../Source Files/Dictonary.cpp"

using std::cout;
using std::endl;
using std::string;


class Hangman
{
public:

    Hangman();
    ~Hangman();
    void run();
private:
    Drawer hgmnDraw;
    Dictonary dictonary;
    std::vector<char> randStringVec;
    string randomString;
    string userGuessLetter;
    void mainGame();
    void drawHangMan(int attempts, int mode);
    void checkIfItEquals(string guessLet);
    void stringToVec();
    void mainGameLoop();
    int attemptsMadeBad = 0, attemptsMadeGood = 0;
    bool correctGs;
};

修改

在BenjaminLindley之后评论下面的问题我做了编辑..并且删除了一个错误，但是仍然有2个相同的错误：

包含在./../Header Files / MainGame.h：5：0中的文件中，来自./MainGame.cpp:2, 来自main.cpp：1：./../ Header Files /../源文件/ Hangman.cpp：在成员函数中'void Hangman :: checkIfItEquals（std :: string）'：./../Header Files /../ Source Files / Hangman.cpp:55:41：错误：从'char'转换为无效 'const char *'[-fpermissive] std :: string charStr = string（ it）; ^在/usr/include/c++/4.8/string:52:0中包含的文件中，来自/usr/include/c++/4.8/bits/locale_classes.h:40，来自/usr/include/c++/4.8/bits/ios_base.h:41，来自/usr/include/c++/4.8/ios:42，来自/usr/include/c++/4.8/ostream:38，来自/usr/include/c++/4.8/iostream:39，来自./../Header Files / MainGame.h：2，来自./MainGame.cpp:2, 来自main.cpp：1：/usr/include/c++/4.8/bits/basic_string.h:490:7：错误：初始化 'std :: basic_string＆lt; _CharT，_Traits的参数1， _Alloc＆gt; :: basic_string（const _CharT ，const _Alloc＆amp;）[with _CharT = char; _Traits = std :: char_traits; _Alloc = std :: allocator]'[-fpermissive] basic_string（const _CharT * __，const _Alloc＆amp; __a = _Alloc（））;

另一个编辑

基本上我没有正确地将char const *转换为string：

for(std::vector<char>::iterator it = randStringVec.begin(); it!=randStringVec.end(); it++)
    {
        std::string charStr = string(*it);
        if(guessLet.compare(charStr) == 0)
        {
            cout << "GOOD JOB.. THERE IS A SIMMILAR LETTER!" << endl;
            break;
        }
    }

正如你在第二行看到的那样，我是类型转换但是根据这个错误不能正常工作：

In file included from ./../Header Files/MainGame.h:5:0,
                 from ./MainGame.cpp:2,
                 from main.cpp:1:
./../Header Files/../Source Files/Hangman.cpp: In member function ‘void Hangman::checkIfItEquals(std::string)’:
./../Header Files/../Source Files/Hangman.cpp:55:41: error: invalid conversion from ‘char’ to ‘const char*’ [-fpermissive]
         std::string charStr = string(*it);
                                         ^
In file included from /usr/include/c++/4.8/string:52:0,
                 from /usr/include/c++/4.8/bits/locale_classes.h:40,
                 from /usr/include/c++/4.8/bits/ios_base.h:41,
                 from /usr/include/c++/4.8/ios:42,
                 from /usr/include/c++/4.8/ostream:38,
                 from /usr/include/c++/4.8/iostream:39,
                 from ./../Header Files/MainGame.h:2,
                 from ./MainGame.cpp:2,
                 from main.cpp:1:
/usr/include/c++/4.8/bits/basic_string.h:490:7: error:   initializing argument 1 of ‘std::basic_string<_CharT, _Traits, _Alloc>::basic_string(const _CharT*, const _Alloc&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]’ [-fpermissive]
       basic_string(const _CharT* __s, const _Alloc& __a = _Alloc());

Answer 1

实际上，您的目标似乎是将单个char转换为std::string。

您无法使用单个std::string初始化char。最后发生的事情是，编译器会尝试将char提升为const char *，与错误描述完全相同。

你想要的是std::string构造函数，它接受一个字符和一个计数：

 std::string charStr = string(1, *it);

请参阅链接here并查看构造函数2)

如何将const * char转换为std :: string

另一个编辑

1 个答案: