分隔字符串数组 [英] Delimit string array

问题描述

我从一个存储在字符串数组中的文件中读取。我想使用stringstream将字符串分成几个部分，但这不会存储任何内容并为cout提供空输出：/

i have read from a file which are stored in a string array. i want to split string into several parts using stringstream, but this wont store anything and gives empty output for cout :/

        stringstream ssss;
ssss << arrayy[i];
getline(ss,line,' ');
first[i].country = line;
getline(ss,line,' ');
first[i].name = line;

但是上面没有给出任何输出：

和av使用空格作为分隔符

but above does not give any output:
and av to use space as delimiter

推荐答案

按照下面的例子：

follow the below example :

#include <iostream>
#include <sstream>
using namespace std;

int main () {

  int val;
  stringstream ss (stringstream::in | stringstream::out);

  ss << "120 42 377 6 5 2000";

  for (int n=0; n<6; n++)
  {
    ss >> val;
    cout << val*2 << endl;
  }

  return 0;
}</sstream></iostream>

输出：

output:

240
84
754
12
10
4000

尝试：

try:

        stringstream ssss;
ssss << arrayy[i];
ssss >>   first[i].country ;
ssss >>   first[i].name ;

但首先测试你的阵列[i]只包含2个单词，或者最后2个fisrt是正确的。 （我假设国家和地区名称是std :: string或simmilar类型的成员）。这将吃掉未使用的空格

but first test that your arrayy[i] contain just 2 words, or at last the 2 fisrt are the correct. (I´m assuming that country and name are members of type std::string or simmilar). This will eat not used spaces

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