read a file c++
// 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;
}how to read and write in a file c++
#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;write in file cpp
#include <iostream>
#include <fstream>
using namespace std;
int main() {
fstream my_file;
my_file.open("my_file.txt", ios::out);
if (!my_file) {
cout << "File not created!";
}
else {
cout << "File created successfully!";
my_file << "Guru99";
my_file.close();
}
return 0;
}Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
