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;
}c++ files
// 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;
}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;
}opening file in c++
/ fstream::open / fstream::close
#include <fstream> // std::fstream
int main () {
std::fstream fs;
fs.open ("test.txt", std::fstream::in | std::fstream::out | std::fstream::app);
fs << " more lorem ipsum";
fs.close();
return 0;
}file c++
#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;
}file reading c++
int a, b;
ifstream bd;
myfile.open("file.txt");
if (myfile.is_open())
while (bd >> a >> b)
cout << a << b << endl;
else cout << "ERROR";Copyright © 2021 Codeinu
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