C + + Learning Note The text file reads the data into a two-dimensional array created by the vector template and is stored as a new text file

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input, output, and documentation for C + + learning notes

Test data:

1 /*reading a TXT file to a two-dimensional array*/2#include <iostream>3#include <fstream>4#include <vector>5#include <string>6 7 using namespacestd;8 9typedef vector< vector<int> > D2array;//two-dimensional arraysTentypedef vector<int> D1array;//one-dimensional arrays One  A  - intMain () - { the     introw =Ten; -     intCol =Ten; -Ifstream input ("e:\\c++\\c++ code\\item_basedcf\\datafordebug.txt");//Open Input File -Ofstream Output ("e:\\c++\\c++ code\\item_basedcf\\mytext.txt");//Open the file you want to write to, and if the file does not exist, automatically create a new +D2array out(Row, D1array (col,0));//declares a two-dimensional array that writes the read-in data to the array -  +     if(!input.is_open ())//if the file fails to open A     { atcout <<"File is not existing!"<<Endl; -Exit1); -     } -  -      for(inti =0; i < row; i++) -     { in          for(intj =0; J < Col; J + +) -         { toInput >> outI [j];//reads characters from input stream object inputs to out +cout << outI [j] <<" ";  -Output << outI [j] <<" ";//The character is stored in output stream object outputs because the output stream is already associated with the mytext.txt, so it is written to the file the         } *cout << Endl;//line break, otherwise displayed in one line $Output << Endl;//Wrap, otherwise the text is all in one linePanax Notoginseng     } -          the  + input.close (); A output.close (); the  +System"PAUSE"); -      return 0; $}

Run Result: Successfully read in out, and dump to Mytext.txt

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