creating a simple program to accept a password.

This is a discussion on creating a simple program to accept a password. within the C++ Programming forums, part of the General Programming Boards category; I just started learning c++ a few days ago and have come across a problem I can't seem to find ...

  1. #1
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    Question creating a simple program to accept a password.

    I just started learning c++ a few days ago and have come across a problem I can't seem to find a solution to. I figure one of you people with lots of experience well go "oh yah that's easy put such and such here and wala!" Anyway I am trying to make a program that asks you for a password and if you get the password right it says something and if you get it wrong it says somethings else. I have applications for this later down the road, but for right now I am starting simple.
    Here is what I have so far...
    #include <iostream.h>
    #include <string.h>
    int main()
    {
    char t[5];
    cout<<"enter password: ";
    cin.getline(t, 5, '\n');
    if (t=="trey")
    {
    cout<<"you are a god"<<endl;
    }
    else
    {
    cout<<"you got it wrong! Haha!"<<endl;
    }
    cout<<"you entered: "<<endl<<t<<endl;
    cout<<"the answer was trey"<<endl;
    cin.get();

    return 0;
    }

    I know I need to do something in line 8, but what I know not...If someone could help me I would greatly appreciate it.
    Thanks in advance,
    Trey

  2. #2
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  3. #3
    Unregistered
    Guest
    ok i read it...how would i aplly it to my program?

  4. #4
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    ok ok ok...i think i figured it out...thanks alot man...this one's been bugging me for several days...lol

  5. #5
    In The Light
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    598

    nit picking

    howdy,
    i went to the tut and started messing with it. it has an error - easy to spot though.

    if(!strcmp(str1,str2)

    should be

    if(!strcmp(srt1, str2))

    hope this isnt being to picky.
    M.R.

  6. #6
    Registered User skyline's Avatar
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    then again, there is always the programmer-friendly version:

    Code:
    #include <iostream> 
    #include <string> 
    
    int main() 
    {
        string s1, s2("trey");
    
        cout << "enter password: ";
        cin >> s1;
    
        if(s1 == s2) { 
    	cout << "you are a god" << endl; 
        } 
        else {
    	cout << "you got it wrong! Haha!" << endl; 
        }
        
        cout << "you entered: " << endl <<s1 << endl; 
        cout << "the answer was " << s2 << endl;
        
        return 0; 
    }

  7. #7
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    password in cosole hidden with '*' as user types

    Here is a way to do it with asteriks. This will hide the password with asteriks as the user types it in.



    Code:
    #include<iostream>
    #include<conio.h>
    
    using namespace std;
    
    void GetPassword( char* entry );
    
    void main( void )
    {
    	
    	char password[10] = "admin";
    	char entry[10]    = "";
    	
    
    	cout << "\nEnter password: " << flush;
    
    
    	GetPassword( entry );
    
    	cout << "\nEntry....." << entry 
    		 << "\nPassword.." << password
    		 << "\nStatus...." << (strcmp(entry, password) == 0 ? " passed " : " failed ") << endl;
    
    
    }
    
    void GetPassword( char *entry )
    {
    	int i = 0;
    	char ch;
    
    	while( 1 )
    	{
    		while( !kbhit() ); //** pause until kentered
    
    		ch = entry[ i++ ] = (char)getch();
    
    		putchar( '*' );
    
    		if( ch == 13 ) //does not like '\n or '\0'
    		{
    			entry[i-1] = '\0';
    			break;
    		}
    		else if( i == 9 )
    		{
    			entry[i] = '\0';
    			break;
    		}
    	}
    }
    zMan

  8. #8
    Just because ygfperson's Avatar
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    does the string class do away with the need for strcmp?

  9. #9
    ¡Amo fútbol!
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    nope

  10. #10
    Skunkmeister Stoned_Coder's Avatar
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    does the string class do away with the need for strcmp?
    yes because it has overloaded operators and its own set of compare member functions
    Free the weed!! Class B to class C is not good enough!!
    And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi

  11. #11
    Just because ygfperson's Avatar
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    is there a way to choose a char in the middle of a string(like temp[3])?

  12. #12
    Skunkmeister Stoned_Coder's Avatar
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    yes you can subscript a string with operator [] or you can use member fuction at()
    Free the weed!! Class B to class C is not good enough!!
    And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi

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