Question

1. Create a program to verify a user name and password given by a user 2. Create a text file named "correctData.txt" (You will NOT upload this file during submission). Place a username on line 1 in the txt file and a password on line 2 in the file. This will be used for testing. 3. Create the following functions and call them starting from main: • void login () - This function is responsible for displaying the prompts asking for user name and password. It will only allow a user to attempt a password 3 times for security measures before returning back to main. You will need to use a loop to accomplish this task. • bool checkCredentials (string username, string password)- In order to validate the username and password. This is a boolean return and will return true or false from this function if the data verified does not match the file. • You will need to use fstream to create an instance of a file using ifstream. Compare the strings to the data in the text file. Remember, the username will be on line 1 in the text file and the password will be on line 2. Remember: 1. Close the fstream file before returning 0 2. Prototype functions. 3. Don't use global variables When completed, upload the.cpp file only! Don't worry about uploading the .txt file. I will supply that when grading.

$GA. C:\Windows\system32\cmd.exe Login Username :MyName Jeff Password:11111111 Invalid username or password. You have 2 remain$

Answer 1

Short Summary:

• Provided the source code and output for the requirement mentioned.

Source Code:

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

// declare Function prototype here
void login();
bool checkCredentials(string ,string );
void getUserInput(string &,string &);

string myArray[2];
string userName;
string password;

// stating point of the program
int main () {
string line;
int index = 0;
// stream of file
ifstream inputFile ("correctData.txt");
// check if the file is open
if (inputFile.is_open()) {
// read each line from file
while (getline (inputFile,line))
{
// adding the line to array
myArray[index] = line;
// incrementing the index value
index++;
}
inputFile.close();
}
else{
cout << "Error opening the file";
}
login();
return 0;
}

// usre input of username and password
void getUserInput(string &userName,string &password){
cout << "Login" << endl;
cout << "\nUsername : ";
cin >> userName;
cout << endl;
cout << "Password : ";
cin >> password;
cout << endl;
}

// method to accomplish the task
void login(){
  
getUserInput(userName,password);
  
if(checkCredentials(userName, password)){
cout << "Login successful! \nPress any key to continue" << endl;
}
else {
cout << "Invalid Username or password. You have 2 remaining."<< endl;
getUserInput(userName,password);
  
if(checkCredentials(userName, password)){
cout << "Login successful! \nPress any key to continue" << endl;
}
  
else{
cout << "Invalid Username or password. You have 1 remaining." <<endl;
getUserInput(userName,password);
  
if(checkCredentials(userName, password)){
cout << "Login successful! \n Press any key to continue" << endl;
}
else
cout << "Attempts exceeded.\n Press any key to continue"<<endl;
}
}
}

// validate user name and password.
bool checkCredentials(string userName,string password){
return (myArray[0] == userName && myArray[1] == password);
}

Refer the following screenshots for code indentation:
#NC cude <LUStream> main.cpp correctData.txt : 2 #include <fstream> 3 #include <string> 4 5 using namespace std; 6 7 // declare Function prototype here 8 void login(; 9 bool checkCredentials(string ,string); 10 void getUserInput(string &, string &); 11 12 string myArray[2]; 13 string userName; 14 string password; 15 16 // stating point of the program 17- int main() { 18 string line; 19 int index = 0; 20 // stream of file 21 ifstream inputFile ("correctData.txt"); 22 // check if the file is open 23 if (inputFile.is_open()) { 24 // read each line from file 25 while (getline (inputFile, line) 26 { 27 // adding the line to array 28 myArray[index] = line; 29 // incrementing the index value 30 index++; 31 } 32 inputFile.close(); 33 34 else{ 35 cout << "Error opening the file"; 36 37 login(); 38 return 0; 39 } 40 41 // usre input of username and password 42 void getUserInput(string &userName, string &password) { 43 cout << "Login" << endl; 44 cout << "\nUsername: 45 cin >> userName; 46 cout << endl; 47 cout << "Password : "; 48 cin >> password; 49 cout << endl; 50 } 51 52 // method to accomplish the task لها

} 54 - void login(){ 55 56 getUserInput(userName, password); 57 58 if(checkCredentials(userName, password)){ 59 cout << "Login successful! \nPress any key to continue" << endl; 60 } 61 else { 62 cout << "Invalid Username or password. You have 2 remaining."<< endl; 63 getUserInput(userName, password); 64 65 if(checkCredentials(userName, password)){ 66 cout << "Login successful! \nPress any key to continue" «< endl; 67 68 69 else{ 70 cout << "Invalid Username or password. You have 1 remaining." <<endl; 71 getUserInput(userName, password); 72 73 if(checkCredentials(userName, password)){ 74 cout << "Login successful! \n Press any key to continue" << endl; 75 } 76 else 77 cout << "Attempts exceeded. \n Press any key to continue"<<endl; 78 } 79 } 80 } 81 82 // validate user name and password. 83 - bool checkCredentials(string userName, string password){ 84 return (myArray[0] == userName && myArray[1] == password); 85 }

Sample Run:

1)

Login Username: test Password : 1234 Invalid Username or password. You have 2 remaining. Login Username : test Password : 123456 Invalid Username or password. You have 1 remaining. Login Username : testr Password : 12 Attempts exceeded. Press any key to continue ... Program finished with exit code 0 Press ENTER to exit console.

2)

Login Username : test Password : 12345 Login successful! Press any key to continue ... Program finished with exit code 0 Press ENTER to exit console. I

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