我可以在C ++函数getline中使用2个或更多定界符吗? [英] Can I use 2 or more delimiters in C++ function getline?

问题描述

我想知道如何在getline函数中使用2个或更多定界符，这是我的问题:

I would like to know how can I use 2 or more delimiters in the getline functon, that's my problem:

程序读取一个文本文件...每一行都像是这样:

The program reads a text file... each line is goning to be like:

   New Your, Paris, 100
   CityA, CityB, 200

我使用的是getline(file，line)，但是当我想要获取CityA，CityB和号码时，我得到了整行.如果我使用'，'分隔符，我将不知道何时是下一行，所以我正在尝试找出解决方案..

I am using getline(file, line), but I got the whole line, when I want to to get CityA, then CityB and then the number; and if I use ',' delimiter, I won't know when is the next line, so I'm trying to figure out some solution..

但是，如何使用逗号和\ n作为分隔符?顺便说一下，我正在操纵字符串类型，而不是char，所以strtok不可能:/

Though, how could I use comma and \n as a delimiter? By the way,I'm manipulating string type,not char, so strtok is not possible :/

一些划痕:

string line;
ifstream file("text.txt");
if(file.is_open())
   while(!file.eof()){
     getline(file, line);
        // here I need to get each string before comma and \n
   }

推荐答案

您可以使用 std :: getline 读取一行，然后将该行传递给

You can read a line using std::getline, then pass the line to a std::stringstream and read the comma separated values off it

string line;
ifstream file("text.txt");
if(file.is_open()){
   while(getline(file, line)){   // get a whole line
       std::stringstream ss(line);
        while(getline(ss, line, ',')){
             // You now have separate entites here
        }
   }

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