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;
}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;
}create file c++
// using ofstream constructors.
#include <iostream>
#include <fstream>
std::ofstream outfile ("test.txt");
outfile << "my text here!" << std::endl;
outfile.close();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;
}files c++
fstream afile;
afile.open("file.dat", ios::out | ios::in );Copyright © 2021 Codeinu
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