Programming help

[xHyperionx]

I need to make a program that is able to take in a 4 letter uppercase password, and then it will go into a loop that will start at AAAA...AAAB...AAAC...AAAD...etc until it reaches the input.

[LB]

If this isn't an assignment... Why?

If this is an assignment, then what have you written so far?

[armonsafai]

make 4 loops looping each position

[xHyperionx]

This is an assignment, and heres what i have so far:
#include <iostream>
#include <cstring>
using namespace std;
int main ()
{
system ("Color 2");
char password[5];
char "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z";
cout << "Please enter a five digit letter only password:";
cin >> password;
-----------------------------------------------------------------------------------------------------------------------
for(int i = 'A'; i < 'Z' + 1; ++i)
if (frequency_table[i] != 0)
std::cout << (c = i) << ": " << frequency_table[i] << '\n';

I know that I need to use the code under the dashes somewher but im not sure how or where

[xHyperionx]

And Armon safii its not that easy becuase you cannot make a for loop counter with letters. I need to be able to convert the letters into numbers which is what the code under the dashes needs to do.

[LB]

Please edit your post and make sure that your code is [code]between code tags[/code] so that it has syntax highlighting and line numbers.

[anup30]

I need to make a program that is able to take in a 4 letter uppercase password, and then it will go into a loop that will start at AAAA...AAAB...AAAC...AAAD...etc until it reaches the input.

did you worked with combinations before?

1. you have to make all 4 letter combinations.
2. then you get all permutatuons by next_permutation()

one and only one of the permutations is correct.

EDIT: http://www.cplusplus.com/articles/L8hv0pDG/

[xHyperionx]

Ok wow lol thats really cool program, but i need it to not generate passwords, but to check them.

[xHyperionx]

Any help?

[anup30]

string pass1 = "akl";
string pass2 = "ghr";
string input;
cin >> input;

if(input == pass1  || input == pass2) 
{
   cout << "access granted!";
}

[xHyperionx]

Ummm correct me if I'm wrong, but I'm pretty sure that that program make the user guess the password? I want the computer to try every possible combination in order to try and guess the password.

[anup30]

i need it to not generate passwords,

I want the computer to try every possible combination in order to try and guess the password.

do you understand they are inconsistent ?

[xHyperionx]

what is inconsistent?

[anup30]

you must generate passwords (combinations/permutations) to find correct one.

if it "guesses" like a lottery it wont be the right password.

[xHyperionx]

No, it guesses the users input...

[booradley60]

xHyperionx wrote:

...its not that easy becuase you cannot make a for loop counter with letters

Sure you can!

for(char firstChar = 'A'; firstChar <= 'Z'; ++firstChar)
{
    for(char secondChar = 'A'; secondChar <= 'Z'; ++secondChar)
    {
        for(char thirdChar = 'A'; thirdChar <= 'Z'; ++thirdChar)
        {
            for(char fourthChar = 'A'; fourthChar <= 'Z'; ++fourthChar)
            {
                std::cout << firstChar << secondChar << thirdChar << fourthChar << std::endl;
            }
        }
    }
}

[xHyperionx]

wait is that actually all there is to it?
lol
and how do i make one so that its not case sensitive and it works for both A and a...?

[anup30]

No, it guesses the users input

do you want only one random guess?
if you try all possible permutations then that cannot be called "guess" !
................
booradley60's program finds all permutations in uppercase.

now if you want a mix of upper and lower eg AaZy, or even include digits, you need function calls in place of the increments.

[xHyperionx]

Ok, like what kind of function calls?

[anup30]

Ok, like what kind of function calls?

function which will tell what ++firstChar means.

because, A to Z is continuous, then what will be the next increment ?