read text from file c++
fstream input;
input.open("Data.txt", ios::in);
string city;
if (input.fail())
{
cout << "File does not exist" << endl;
cout << "Exit program" << endl;
}
while (!input.eof()) // Continue if not end of file
{
getline(input, city, '.');//getline(file,string,delimit char)
cout << city << endl;
}
input.close();
//Another solution
fstream file2;
file2.open("Data.txt", ios::in);
string line;
cout << "Data file: \n";
if (file2.is_open()) { //check if the file is open
while (getline(file2, line)) {
cout << line << endl;
}
file2.close();
}
how to open and read text files in c++
// This is how you read a file, and keep it's text in a vector of strings
#include <bits/stdc++.h>
using namespace std;
vector<string> Read_File(string FileName){
ifstream infile;
infile.open(FileName);
vector<string> empty;
if(infile.fail()){
cout << "File Could Not Be Reached";
return empty;
}
vector<string> answer;
while(infile.good()){
string str;
infile >> str;
answer.push_back(str);
}
infile.close();
return answer;
}
int main(){
vector<string> file_text = Read_File("textfile.txt");
}
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;
}