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
Read whole ASCII file into C++ std::string
This is a simple way to read whole ASCII file into std::string in C++ −
Algorithm
Begin Declare a file a.txt using file object f of ifstream type to perform read operation. Declare a variable str of string type. If(f) Declare another variable ss of ostringstream type. Call rdbuf() fuction to read data of file object. Put the data of file object in ss. Put the string of ss into the str string. Print the value of str. End.
Example
#include<iostream>
#include<fstream>
#include<sstream>
#include<string>
using namespace std;
int main() {
ifstream f("a.txt"); //taking file as inputstream
string str;
if(f) {
ostringstream ss;
ss << f.rdbuf(); // reading data
str = ss.str();
}
cout<<str;
}Input
a.txt data file containing the text “hi”
Output
hi
Updated on: 24-Jun-2020
11K+ Views
Advertisements