C ++ Wierd在调用的函数上崩溃

Question

I checked the return of GetCharacterRankINT() and it is returning the right value (1). When I tested the query with the rankNum 1 I got the right result, but whenever I try to use GetCharacterRankSTR() it crashes with the following crash dump: http://fbe.am/rwl (Password: stackoverflow). I tried to set the type of the function from string to std::string and it still didn't work. The MySQL table has 8 columns, or so the field has 8 entries. Therefore the error is not related to the amount of fields.

string Player::GetCharacterRankSTR()
{
    QueryResult* res = CharacterDatabase.Query("SELECT * FROM ars_ranks WHERE rankNum = %u LIMIT 1;", GetCharacterRankINT());
    if (!res)
    {
        return "Error";
    }
    else
    {
        Field* fld = res->Fetch();
        return fld[3].GetString();
    }
}

My question is: What am I doing wrong in the function so that it crashes?

Answer 1

经过一些测试，我找到了解决方法...我只需要从字符串更改为const char *。