创建类实例变量的麻烦

时间:2015-03-11 18:00:01

标签: c++ visual-c++

我正在编写一个小程序来为开始的c ++课程生成一个字符。

我在库存部分遇到问题。

我使用Visual Studio,当我尝试设置库存数组时,出现此错误:

  

'返回' :无法转换为' std :: string'到' std :: string *'

谷歌搜索并没有发现任何有用的东西。

有人可以看看代码,并告诉我它为什么会失败吗?

由于

using namespace std;

int generateXp(int);


class Character {
private:

int xp = 0;
static const string inv[4];

public:

void setXp(int xp){
    this->xp = xp;
}

int getXp() {
    return this->xp;
}

string *getInv();

string* Character::getInv() {
string inv = { "shield", "chainmail", "helmet" };
return inv;
}

int main()
{
srand(time(NULL));

Character * Gandalf = new Character;
cout << "Gandalf has " << Gandalf->getXp() << " experience points.\n";
Gandalf->setXp(generateXp(100));
cout << "Gandalf now has " << Gandalf->getXp() << " experience points.\n";
cout << "Inventory " << Gandalf->getInv() << "\n";
}

int generateXp(int base)
{
int randomNumber = 0;

randomNumber = (rand() % 5000) + 1;

return randomNumber;
}

1 个答案:

答案 0 :(得分:1)

以下功能出现问题:

string* Character::getInv()
// ^^^^ The return type is std::string*
{
   string inv = { "shield", "chainmail", "helmet" };
   return inv;
   // And you are returning a std::string
}

而不是:

string inv = { "shield", "chainmail", "helmet" };
return inv;

你可能意味着:

static string inv[] = { "shield", "chainmail", "helmet" };
return inv;

<强>更新

返回std::vector会更好。然后,您可以更轻松地访问std::vector的内容。您不必对数组的大小做出假设。

std::vector<std::string> const& Character::getInv()
{
   static std::vector<std::string> inv = { "shield", "chainmail", "helmet" };
   return inv;
}

更改用法:

std::vector<std::string> const& inv = Gandalf->getInv();
cout << "Inventory: \n";
for (auto const& item : inv )
{
   cout << item << "\n";
}