Login System With Asterisk in C++

 Machine Problem in C++

 Write a program to ask the user to give a password and the program will check if the password is right or not.  The program will hide the password using an asterisk character and the user can press the backspace for correction of the password. The program will repeat running itself if the given password is incorrect and exit when the right password is given by the user of the program.

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Program Listing

/* 

 Machine Problem in C++

 

 Write a program to ask the user to give a password

 and the program will check if the password is right or not.

 The program will hide the password using an asterisk character

 and the user can press the backspace for correction of the

 password. The program will repeat running itself if the 

 given password is incorrect and exit when the right password

 is given by the user of the program.

 

 password.cpp

 Mr. Jake Rodriguez Pomperada, MAED-IT,MIT

 www.jakerpomperada.com

 www.jakerpomperada.blogspot.com

 jakerpomperada@gmail.com

 Bacolod City, Negros Occidental Philippines

 

 */

#include <iostream>

#include <conio.h>

#include <string>

using namespace std;

const int PASSLEN = 4;

string passget();

void start()

{

string password;

cout << "\n\n";

cout << "\tLogin System With Asterisk in C++";

cout << "\n\n";

cout << "\tEnter Your Password: ";

password = passget();

if (password == "jake") {

    cout << "\n\n";

    cout << "\tPassword Accepted";

    cout << "\n\n\n";

    cout << "\t\t Thank You For Using this Software";

}

else {

    cout << "\n\n";

    cout << "\tPassword Denied Try Again !!!";

    start();

}

}  // End of Start Function

int main()

{

    start();

getch();

}

string passget()

{

char password[PASSLEN], letter;

int loop;

int len;

string password2;

//Get Password and replace letters with *--------------

loop = 0;

while(loop != PASSLEN)

{

password[loop] = '\0';

loop++;

}

loop = 0;

len = 0;

letter = '\0';

while( letter != '\r' )

{

letter = getch();

if( letter == '\b' && password[0] == '\0')

{

loop = 0;

len = 0;

}

else

{

if( letter == '\b' && password[0] != '\0')

{

cout << "\b";

cout << " ";

cout << "\b";

loop--;

password[loop] = '\0';

len--;

}

else

{

if( isprint( letter ) != 0 && loop < PASSLEN)

{

password[loop] = tolower(letter);

cout << "*" ;

}

loop++;

if (loop <= PASSLEN)

len++;

}

}

}

//Convert Password from character array to string

loop = 0;

len = len;

password2 = "";

while (loop != len)

{

password2 = password2+password[loop];

loop++;

}

return password2;

 } // End of Function Password