"file c++" Code Answer's

read a file c++

By Aggressive Alligator on Jul 07, 2020

// reading a text file
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main () {
  string line;
  ifstream myfile ("example.txt");
  if (myfile.is_open())
  {
    while ( getline (myfile,line) )
    {
      //use line here
    }
    myfile.close();
  }

  else cout << "Unable to open file"; 

  return 0;
}

Source: www.cplusplus.com

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c++ files

By White Spoonbill on Nov 09, 2019

// basic file operations
#include <iostream>
#include <fstream>
using namespace std;

int main () {
  ofstream myfile;
  myfile.open ("example.txt");
  myfile << "Writing this to a file.\n";
  myfile.close();
  return 0;
}

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how to read and write in a file c++

By Glamorous Gibbon on Apr 04, 2020

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

ifstream file_variable; //ifstream is for input from plain text files
file_variable.open("input.txt"); //open input.txt

file_variable.close(); //close the file stream
/*
Manually closing a stream is only necessary
if you want to re-use the same stream variable for a different
file, or want to switch from input to output on the same file.
*/
_____________________________________________________
//You can also use cin if you have tables like so:
while (cin >> name >> value)// you can also use the file stream instead of this
{
 cout << name << value << endl;
}
_____________________________________________________
//ifstream file_variable; //ifstream is for input from plain text files
ofstream out_file;
out_file.open("output.txt");

out_file << "Write this scentence in the file" << endl;

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file c++

By YRMOX on Feb 27, 2021

#include <iostream>
#include <string>
#include <fstream> //write and read
//#include <ifstream> //read
//#include <ofstream> //write

int main () {
  std::string line;
  std::ofstream myfileWrite;
  std::ifstream myfileRead;
  myfileWrite.open("example.txt");
  myfileRead.open("example.txt");
  myfileWrite << "Writing this to a file.\n";
  while (getline(myfileRead,line)){
    std::cout << line << '\n';
  }
  myfileWrite.close();
  myfileRead.close();
  return 0;
}

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How to read a file in in C++

By Black Buffalo on Mar 13, 2020

// io/read-file-sum.cpp - Read integers from file and print sum.
// Fred Swartz 2003-08-20

#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;

int main() {
    int sum = 0;
    int x;
    ifstream inFile;
    
    inFile.open("test.txt");
    if (!inFile) {
        cout << "Unable to open file";
        exit(1); // terminate with error
    }
    
    while (inFile >> x) {
        sum = sum + x;
    }
    
    inFile.close();
    cout << "Sum = " << sum << endl; 
    return 0;
}

Source: www.fredosaurus.com

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c++ lettura file

By Cirex on Mar 21, 2020

#include <fstream.h>

void main() 
{
  ifstream OpenFile("cpp-input.txt");
  char ch;
  while(!OpenFile.eof())
  {
    OpenFile.get(ch);
    cout << ch;
  }
  OpenFile.close();
}

Source: www.mrwebmaster.it

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