Cerr — Error Stream Object in C++

Tushar Rohilla
Jun 7, 2020 · 2 min read

Introduction

The Difference

#include<bits/stdc++>
using namespace std;
int main()
{
cout << "Hey there, Geek! :: cout" << endl;cerr << "Hey there, Geek! :: cerr" << endl;return 0;}
Hey there, Geek! :: cout
Hey there, Geek! :: cerr

So, what can be derived from their usage?

#include <iostream>
#include<fstream>
using namespace std;
int main()
{char fileName[] = "data.txt";// Opening a file using the infile object of ifstream class in fstream header file
ifstream infile(fileName);
// If the file exists, start reading from the fileif(infile)
cout << infile.rdbuf();
// If any problem occurs, this message is shown as a error.
// This way, user can clearly diffrenciate between legit output and //errors in their code.
else
cerr << "Error while opening the file " << fileName <<endl;
return 0;}

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Tushar Rohilla

Written by

passionate about badminton, code and I love my OnePlus 😇 :: Sophomore, IIT Roorkee

The Startup

Get smarter at building your thing. Follow to join The Startup’s +8 million monthly readers & +785K followers.

Tushar Rohilla

Written by

passionate about badminton, code and I love my OnePlus 😇 :: Sophomore, IIT Roorkee

The Startup

Get smarter at building your thing. Follow to join The Startup’s +8 million monthly readers & +785K followers.

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