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;
}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;
}fstream in c++
#include<fstream>
int main()
{
fstream file;
/*if we use fstream then we need to specify at least one
parameter mode like ios::out or ios::in else the file will not open */
file.open("filename.txt", ios::out|ios::in);
/*all work with file*/
file.close();
return 0;
}How to read a file in in C++
// 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;
}write to file in C++
ofstream myfile;
myfile.open("file.txt");
myfile << "write this to file"Copyright © 2021 Codeinu
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