Question

class Interacao{
  vector<string> v_line;
...
public:
  void comando_load(istringstream & iss);
};

void Interacao::comando_load(istringstream & iss){
v_line.empty();
string line;
string fname = "ini.txt";
int it = 0;

ifstream file(fname);

while (!file.eof()){
    it++;
    getline(file, line);
    cout << line << endl; //this works like it should if the line below is commented
    v_line.push_back(line); //this keeps adding line to the vector infinitely       
}
file.close();
}

我尝试做的是从文本文件中读取文件（而不是在控制台中键入它们），将它们放在字符串向量中，然后使用相同的代码读取控制台插入的命令，并进行一些修改（iss.str（line），getline（cin，line）disabled-＆gt; flag），但它不会停止向向量添加行...

很抱歉非常不清楚，太困惑，无法清楚地识别/解释问题。

提前谢谢你， -ec。

编辑：＆＃34;完整＆＃34;代码

class Interacao{
    Consola c;
    vector<string> v_linha;
public:

};


void Interacao::comando_load(istringstream & iss){
    v_linha.empty();
    string linha;
    string nome_fich = "ini.txt";

    ifstream fich(nome_fich);

    while (!fich.eof()){
        getline(fich, linha);           
        v_linha.push_back(linha); //adds command from file to vector
    }
    fich.close();
}

void Interacao::Le_Comando(){

    string linha;
    Populacao* pop_jogador = nullptr;
    bool flg_pop_jgdr = 0;
    unsigned int cont = 0;

    unsigned int it = 0;
    int iComando = 0;
    int iCalls = 0;

    do{
        c.gotoxy(3, 56);  //error: this goes to a specific place on the console, it's on infinite cycle thus not allowing any action

        if (linha.length() != 0)
            c.clrcmd(linha.length());

        while (it < v_linha.size()){
            linha = v_linha[it];
            it++;
            break;
        }

        cont = v_linha.size(); //if the vector is not empty, disables cin, reads from vector instead instead cont = EOF
        if (cont == 0){
            getline(cin, linha);
        }

        if (cont > 0){ //has commands to read in vector, read 1 command, decreases cont
            cont--;
        }

        istringstream iss;
        iss.str(linha); //command

        iComando = escolheComando(iss); //converts string to int for the switch
        switch (iComando){
        case 0: //sair (exit)
            cout << "Terminou o jogo. A desligar...";
            exit(1); break;
        case 1: //load
            comando_load(iss);
            break;

        }
    } while (iComando != 0);
}

Answer 1

getline在最后一个输入行上失败，并在eof中设置失败位而不是fich。结论：如果没有在循环中进行额外的测试，就不要使用while (!file.eof()){...}，否则你会遇到麻烦。

Answer 2

我不是一个非常聪明的人，我必须承认，发现问题，这里是：

do{
cont = v_linha.size(); //<<<<<<<< can't be inside the loop....
    if (cont == 0){
        getline(cin, linha);
    }

    if (cont > 0){ //has commands to read in vector, read 1 command, decreases cont
        cont--;  //<<<<<<<<<< ....for this to work properly...
    }
}while(...);

修正了，非常感谢你。

从文件中读取 - ＆gt;添加到矢量...无限循环

2 个答案: