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read and write file in c++

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gocrazygh answered on January 10, 2022 Popularity 10/10 Helpfulness 3/10

answer read and write file in c++

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read and write file in c++

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#include<iostream>
#include<fstream>

using namespace std;

int main()
{

    string fileName;
    int choice;
    cout << "Enter txt file name:\n";
    cin >> fileName;
    cout << "Enter number of command:\n";
    cout << "1. Write file\n";
    cout << "2. Read file\n";
    cin >> choice;

    if (choice == 1)
    {
            ofstream myfile;
            string text;
            myfile.open (fileName);
            cout << "Write text below: \n"; //file must have no text
            cin >> text;
            myfile << text;
            myfile.close();
    }else if (choice == 2)
    {
            ifstream file(fileName);
            string line;

            if (file.is_open())
            {
	            while (getline(file, line))
                {
        	       cout << line << endl;
                }
    }
    }
    return 0;
}

Popularity 10/10 Helpfulness 3/10 Language cpp

Source: Grepper

Tags: c++ file

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Contributed on Apr 28 2022

gocrazygh

0 Answers Avg Quality 2/10

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c++ write to file

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#include <fstream>

int main()
{
    // ofstream = output file stream
    std::ofstream stream("example.txt"); // Open
    
    if (!stream)
        return 1; // Error while opening file!

    stream << "Some text here"; // Write
    return 0;
} // The file is automatically closed by the destructor.

Popularity 10/10 Helpfulness 7/10 Language cpp

Source: Grepper

Tags: c++

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Contributed on Nov 24 2023

The Guy Who Reads The Docs

0 Answers Avg Quality 2/10

c++ how to read from a file

Comment

#include <fstream>
#include <iostream>

using namespace std;

int main() {
    /* You create a stream using the file in a 
     * similar way to how we use other streams.
     */
    ifstream in;
    // Open the file
    in.open("names.txt");
    if(in.fail())
        cout << "File didn't open"<<endl;

    int count = 0;
    string line;
    while (true) {
        /* Get line will work as long as there is
         * a line left. Once there are no lines 
         * remaining it will fail. 
		 */
        getline(in, line);  
        if (in.fail()) break;
        
        /* Process the line here. In this case you are
         * just counting the lines.
         */
        count ++;
    }
    
    cout << "This file has " << count << " lines." << endl;
    return 0;
}

Popularity 10/10 Helpfulness 4/10 Language cpp

Source: Grepper

Tags: c++

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Contributed on Jan 10 2022

Foolish Fish

0 Answers Avg Quality 2/10

c++ how to read file

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// Create a text string, which is used to output the text file
string myText;

// Read from the text file
ifstream MyReadFile("filename.txt");

// Use a while loop together with the getline() function to read the file line by line
while (getline (MyReadFile, myText)) {
  // Output the text from the file
  cout << myText;
}

// Close the file
MyReadFile.close(); 

//https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwi72ffun_D-AhXwh4sKHcB0A3UQFnoECAIQAQ&url=https%3A%2F%2Fwww.w3schools.com%2Fcpp%2Fcpp_files.asp&usg=AOvVaw1vZ4bdMEms4A0c4W27IrsT

Popularity 9/10 Helpfulness 3/10 Language cpp

Source: Grepper

Tags: c++ file fil

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Contributed on May 12 2023

m_zsuetam

0 Answers Avg Quality 2/10

file handling read and write in c++

Comment

#include <iostream>
#include <fstream>

using namespace std;

int main(){
  fstream file;
  file.open ("example.txt", ios::out | ios::in );
  return 0;
}

Popularity 9/10 Helpfulness 3/10 Language cpp

Source: www.codesdope.com

Tags: c++ file-handling file-handl

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Contributed on Sep 09 2022

Excited Emu

0 Answers Avg Quality 2/10

read and write file in c++

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