将基于文本的列数据存储到数组 C++ 中

Store text based columns data into array C++

我正在尝试将文本文件中的数据存储到数组中,以便以后使用。问题是当每个数据都有一个表头时,如何在文本中间跳过一行或单独取?

#include <iostream>
#include <fstream>



main() {
    double tab[100][6] = {0};
    int  i =0, j;
   std::string name = "test.txt";
//   std::cout << "Enter filename: ";
//   std::cin >> name;

   std::fstream file;
   std::string word;
   file.open(name.c_str());
   std::getline(file,word); // skip the first line
   while(file >> word) { //take word and print
      std::cout << word << std::endl;
      for(int j=0; j<=5; j++){
      tab[i][j] = stoi(word);
      }
      i++;
   }
   file.close();
   // displaying
   for(int j = 0; j<= 40;j++){
    std::cout << tab[i][0] << "\t" <<  tab[i][1] << "\t" << tab[i][2] << "\t" << tab[i][3] << "\t" << tab[i][4] << "\t" << tab[i][5];
   }
}

test.txt 文件

18407022  2018-07-05 00:04:02  MHAM  EIDW  42  S1REB  RYR5GW  3726  JNEIE  837B  Datum  RYR  IFR  Undefined  1  1  2018-07-05  00:15:38  2018-07-05  00:22:56  111  extended
0.0  113416.9  479798.5  -0.2  3.6  0.0
4.0  113395.2  479785.0  1.2  9.3  25.5
8.0  113352.2  479758.7  1.2  16.0  75.9
12.0  113284.9  479717.4  0.5  23.6  154.9
16.0  113189.9  479659.1  -0.5  32.2  266.3
20.0  113064.3  479582.1  -0.9  41.7  413.7
24.0  112904.9  479483.9  -0.3  52.1  600.9
18407022  2018-07-05  00:12:14  MHAM  EIDW  42  S1REB  RYR5GW  3726  JNEIE  837B  Datum  RYR  IFR  Undefined  1  1  2018-07-05  00:30:38  2018-07-05  00:42:56  111  extended
0.0  145431.6  480046.3  4533.3  180.4  0.0
4.0  144747.1  480268.2  4493.4  179.5  719.5
8.0  144059.0  480468.7  4452.0  179.0  1436.2
12.0  143368.6  480655.3  4409.8  178.7  2151.4
16.0  142677.0  480835.6  4367.6  178.6  2866.1
20.0  141985.8  481017.2  4326.1  178.8  3580.9
24.0  141295.9  481207.3  4286.1  179.0  4296.4

也许你先看完整行,有没有字母(a-zA-Z)?!

#include <regex>

...
std::regex e("a-zA-Z");

while(file >> word) { //take word and print
  
  if ( std::regex_match ( word, e))
    continue;
...

您可以尝试将文本文件中的每个 header 标记为注释,方法是在每个 header.

的开头放置一个 #

现在像这样阅读文本文件:

#include<sstream>
...

...
std::ifstream file {"test.txt"};
std::string line;
std::istringstream iss;
double tab[100][6];
int i=0, j;
...

while (getline(file, line))
{
  if (!(line[0]=='#'))
  {
    iss.str(line);

    for (j=0; j<6; ++j)
      iss >> tab[i][j];
    
    iss.clear();

    ++i;
  }
}

file.close();