从 .txt 文件中读取多种数据类型，其中一个字符串有空格 C++ [英] Reading In Multiple Data types from a .txt file where one of the strings has spaces C++

问题描述

我有一个看起来像这样的文本文件:

I have a text file that looks like this:

汽车，CN，819481，维修，假，无

Car, CN, 819481, maintenance, false, NONE

汽车，SLSF，46871，商业，真实，孟菲斯

Car, SLSF, 46871, business,true, Memphis

汽车，AOK，156，温柔，真实，旧金山

Car, AOK, 156, tender, true, San Francisco

(逗号实际上是制表符，但我无法在此站点上正确设置它们的格式)

(the commas are tabs in actuality, but I was unable to get them to format properly on this site)

我有一个名为 Car 的对象，我正在将代码读入并使用代码底部的输出进行输出.我当前的代码可以读取所有前 5 种数据类型，但我无法读取最后一列可能有空格的内容.我曾尝试使用 getline，但无济于事.

I have an object called Car which i am reading the code into and outputting using the output at the bottom of the code. My current code can read in all of the first 5 data types, but I am having trouble with reading in the last column where there can be spaces. I have tried using getline, but to no avail.

这是我将txt作为输入的函数的代码

Here is the code that I have for the function that takes the txt as inputs

void input()
{
    ifstream inputFile;
    inputFile.open("input.txt",fstream::in);

    if (inputFile.fail())
    {
        cout<<"input failed"<<endl;
        exit(1);
    }

    string type;
    string reportingMark;
    int carNumber;
    string kind;
    bool loaded;
    string destination;

    while(inputFile.peek() != EOF)
    {
        inputFile>>type>>reportingMark>>carNumber>>kind>>loaded;
        while(inputFile.peek() == ' ')
            inputFile.get();
            getline(inputFile, destination);

        Car temp(reportingMark, carNumber, kind, loaded, destination);
        temp.output();
    }

    inputFile.close();
}

推荐答案

不要使用>>操作符，使用getline:

Don't use >> operator, use getline:

string line;
while (getline(inputFile, line) {
  // split line by tabs or commas
}

分割函数示例:

vector<string> explode(string &str, char separator) {
  vector<string> result;
  string tmp;

  for (int i = 0; i < str.size(); i++) {
    if (str[i] == separator) {
      result.push_back(tmp);
      tmp.clear();
    } else tmp += str[i];
  }

  if (tmp.size() > 0)
    result.push_back(tmp);

  return result;
}

我希望 std::vector 对你来说不难.示例加载代码(而不是 while(inputFile.peek() != EOF) { ... }):

I hope that std::vector isn't hard for you. Example loading code (instead while(inputFile.peek() != EOF) { ... }):

string line;
while (getline(inputFile, line) {
  vector<string> data = split(line, '\t');  // Or use ASCII code 9
  if (data.size() != 5) {
    cout << "Invalid line!" << endl;
    continue;
  }

  Car temp(data[0], data[1], stoi(data[2]), data[3], data[4]);
  temp.output();
}

不要复制粘贴此代码，我看到您有未处理的 bool 变量等.

Don't copy-paste this code, I see that you have bool variables etc. that is not handled.

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