File reading c++

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++ how to read from a file

#include <fstream>
#include <iostream>

using namespace std;

int main() {
    /* You create a stream using the file in a 
     * similar way to how we use other streams.
     */
    ifstream in;
    // Open the file
    in.open("names.txt");
    if(in.fail())
        cout << "File didn't open"<<endl;

    int count = 0;
    string line;
    while (true) {
        /* Get line will work as long as there is
         * a line left. Once there are no lines 
         * remaining it will fail. 
		 */
        getline(in, line);  
        if (in.fail()) break;
        
        /* Process the line here. In this case you are
         * just counting the lines.
         */
        count ++;
    }
    
    cout << "This file has " << count << " lines." << endl;
    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";

-1

Similar codes

0 vote255 views1 answer
Stringstream stream number to string
C++
0 vote255 views1 answer
Strip whitespace c++
C++
0 vote250 views2 answers
Faxc
C++
0 vote256 views1 answer
Fill vector with zeros c++
C++
102 votes397 views6 answers
Convert integer to string in c++
C++
-2 votes275 views4 answers
Memset function in C++
C++
0 vote264 views2 answers
C++ namespace example
C++
0 vote259 views1 answer
Fisher–Yates shuffle Algorithm c++
C++
0 vote261 views1 answer
Std::map get all keys
C++
1 vote251 views1 answer
Save all output in log file c cpp
C++