A program that determines a password is either wrong or correct. What is wrong in my source code?

Question

1.00/5 (4 votes)

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C++

#include<iostream>
using namespace std;
main ()
{
	//Local variable declaration
	string password = "Pretty BOY";
	string input;
	
	//Input data
	cout<<"Input password: ";
	cin>>input;
	
	//Process to check condition
	if (input == password)
	{
		cout<<"Access Granted.";
	}
	else 
	{
		cout<<"Access Denied, incorrect password.";
	}
}

What I have tried:

i dont know what's the problem

Posted 5-Dec-18 21:54pm

Member 14079545

Updated 5-Dec-18 22:18pm

KarstenK

v2

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OriginalGriff · Answer 1 · 2018-12-05T22:09:00

Look at what cin does: Basic Input/Output - C++ Tutorials[^] and you will see:

Quote:
However, cin extraction always considers spaces (whitespaces, tabs, new-line...) as terminating the value being extracted, and thus extracting a string means to always extract a single word, not a phrase or an entire sentence.

To get an entire line from cin, there exists a function, called getline, that takes the stream (cin) as first argument, and the string variable as second.

CPallini · Answer 2 · 2018-12-05T22:13:00

The blank is a separator for cin so, if the user enters (correctly) 'Pretty BOY', the variable input would be assigned with 'Pretty'. You may fix it reading the whole line:

C++

#include<iostream>
using namespace std;
int main ()
{
  //Local variable declaration
  string password = "Pretty BOY";
  string input;

  //Input data
  cout<<"Input password: ";
  getline(cin, input);


  //Process to check condition
  if (input == password)
  {
    cout<<"Access Granted.\n";
  }
  else
  {
    cout<<"Access Denied, incorrect password.\n";
  }
}

A program that determines a password is either wrong or correct. What is wrong in my source code?

2 solutions

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