Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
What is the best way to read an entire file into a std::string in C++?
This is an simple way to read an entire file into std::string in C++
Algorithm
Begin Take the filename as inputstream. Declare a string variable str. Read the file till the end by using rdbuf(). Put the data into st. Print the data. End.
Example Code
#include<iostream>
#include<fstream>
#include<sstream>
#include<string>
using namespace std;
int main() {
ifstream f("a.txt");
string str;
if(f) {
ostringstream ss;
ss << f.rdbuf();
str = ss.str();
}
cout<<str;
}Input
a.txt data file contains the string “hi”
Output
hi
Updated on: 30-Jul-2019
2K+ Views
Advertisements