Question

好吧所以我正在制作另一个自制类的数组的字典类：Entry ...我正在尝试创建一个条目数组......我最终设法摆脱了大多数错误......除了一个说明错误的是cstdio：

错误：从'const char（*）[11]'转换为非标量类型'L :: Entry'请求

我无法弄清楚是否有任何错误，但我已经指出数组初始化是错误启动...继承我测试我的Entry类的主文件的代码：

#include "Entry.cpp"
#include <iostream>
#include <cstdlib>
#include <cstdio>
using namespace std;
using namespace L;
int main(){
Entry entry("word", "definition");
cout << "entry's word is: " << entry.getWord() << endl;
cout << "entry's definition is: " << entry.getDefinition() << endl;

cout << "\n\n\n" << endl;

Entry entries[2] = {
    &Entry("Word", "Definition"),
    &Entry("Otherword", "OtherDefiniin")
}; 

cout << "entries's word is: " << entries[1].getWord() << endl;
cout << "entries's definition is: " << entries[1].getDefinition() << endl;
return 0;
}

这里是Entry.cpp：

#include "Entry.h"
#include <string.h>
namespace L
{
//constructors and destructors
Entry::Entry(const char *word, const char *def) : word(word), def(def){}
Entry::Entry(Entry &entryObj) : word(entryObj.word), def(entryObj.def){}
Entry::~Entry(){}
//setter methods
void Entry::setWord(char *newWord){Entry::word = newWord;}
void Entry::setDefinition(char *newDef){Entry::word = newDef;}
//getter methods
std::string Entry::getWord(){return Entry::word;}
std::string Entry::getDefinition(){return Entry::def;}
}

最后是Entry.h：

#include <cstdlib>
#include <cstring>
#include <string>
#include <string.h>
#ifndef ENTRY_H
#define ENTRY_H
namespace L
{
    class Entry
        {
        public:
            //constructors and destructors
            Entry(const char *word = "", const char *def = "");
            Entry(Entry &entryObj);
            virtual ~Entry();
            //setter methods
            void setWord(char *newWord);
            void setDefinition(char *newDef);
            //getter methods
            std::string getWord();
            std::string getDefinition();
        private:
            std::string word;
            std::string def;

        };


}
#endif

提前感谢...

Answer 1

Entry entries[2] = {
    &("Word", "Definition"),
    &("Otherword", "OtherDefiniin")
};

什么是&(....)？

我认为你的意思，

Entry entries[2] = {
    Entry("Word", "Definition"),
    Entry ("Otherword", "OtherDefiniin")
};

此外，

Entry::Entry(const char *word, const char *def){
    strcpy(Entry::word, word);
    strcpy(Entry::def, def);
}

首先，你为什么要写Entry::word？此外，您还没有为word分配内存。

我建议您使用std::string代替char*：

//put them in the class definition
std::string word;
std::string def;

//constructor definition outside the class
Entry::Entry(const char *word, const char *def) : word(word), def(def) { }

并删除其他带有非const char*的构造函数。它不需要！

Answer 2

我弄清楚了......在弄乱Nawaz给我的代码之后。我终于，由于某种原因启用了所有警告并找到了“临时地址”我查了一下然后决定尝试使数组等于预先初始化的对象...即

Entry *entry("Word","Definition");
Entry *entry2("Word2","Definition2");
Entry *entries[2];
entries[0] = &entry;
entries[1] = &entry2;

它最终没有运行时错误或编译器错误

错误：从'const char（*）[11]'转换为非标量类型'L :: Entry'请求g ++ 4.4.5

2 个答案: