write to file in c 2b 2b

1// basic file operations
2#include <iostream>
3#include <fstream>
4using namespace std;
5
6int main () {
7  ofstream myfile;
8  myfile.open ("example.txt");
9  myfile << "Writing this to a file.\n";
10  myfile.close();
11  return 0;
12}

1#include <iostream>
2#include <fstream>
3using namespace std;
4
5ifstream file_variable; //ifstream is for input from plain text files
6file_variable.open("input.txt"); //open input.txt
7
8file_variable.close(); //close the file stream
9/*
10Manually closing a stream is only necessary
11if you want to re-use the same stream variable for a different
12file, or want to switch from input to output on the same file.
13*/
14_____________________________________________________
15//You can also use cin if you have tables like so:
16while (cin >> name >> value)// you can also use the file stream instead of this
17{
18 cout << name << value << endl;
19}
20_____________________________________________________
21//ifstream file_variable; //ifstream is for input from plain text files
22ofstream out_file;
23out_file.open("output.txt");
24
25out_file << "Write this scentence in the file" << endl;

1#include <iostream>
2#include <fstream>
3using namespace std;
4int main() {
5	fstream my_file;
6	my_file.open("my_file.txt", ios::out);
7	if (!my_file) {
8		cout << "File not created!";
9	}
10	else {
11		cout << "File created successfully!";
12		my_file << "Guru99";
13		my_file.close();
14	}
15	return 0;
16}
17

1#include<iostream>
2#include<fstream>
3
4using namespace std;
5
6int main() {
7
8 ifstream myReadFile;
9 myReadFile.open("text.txt");
10 char output[100];
11 if (myReadFile.is_open()) {
12 while (!myReadFile.eof()) {
13
14
15    myReadFile >> output;
16    cout<<output;
17
18
19 }
20}
21myReadFile.close();
22return 0;
23}
24
25

1ofstream myfile;
2myfile.open("file.txt");
3
4myfile << "write this to file"

1++ cCopy#include <iostream>
2#include <fstream>
3
4using std::cout; using std::ofstream;
5using std::endl; using std::string;
6using std::fstream;
7
8int main()
9{
10    string filename("tmp.txt");
11    fstream file_out;
12
13    file_out.open(filename, std::ios_base::out);
14    if (!file_out.is_open()) {
15        cout << "failed to open " << filename << '\n';
16    } else {
17        file_out << "Some random text to write." << endl;
18        cout << "Done Writing!" << endl;
19    }
20
21    return EXIT_SUCCESS;
22}
23