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

-1 vote185 views1 answer
How to define range of numbers inside a if condition in c++
C++
1 vote119 views1 answer
Start with pure c++ and opengl gamedev
C++
0 vote143 views1 answer
Error in c++
C++
0 vote130 views1 answer
Contoh space
C++
0 vote121 views1 answer
What is g++ and gcc
C++
1 vote124 views1 answer
Find largest number in vector c++
C++
5 votes128 views2 answers
String c++ if letter is lowercase
C++
0 vote129 views1 answer
C language all keywords in string
C++
0 vote136 views1 answer
C++ class constructor variable arguments
C++
0 vote131 views2 answers
Ue4 c++ replicate actor variable
C++