C++ :: How To Calculate And Apply All Char Combinations

Jan 12, 2015

how to write a password cracking program that will try all possible char combinations for just two chars (without duplicating any combination guesses). Obviously, there would only be 4 possible truth table combinations for two boolean values, but how would a person calculate the number of all possible combinations for two values with 70 different possible chars?

#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>
using namespace std;
static const char alphanum[] =
"0123456789"
"!@#$%^&*"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz";
/*

Boolean Truth Table for two values:

p q
-----
T T
T F
F T
F F

Note that there are 70 chars in all specified above.

It will require much more than a simple truth table to try every possible char combination (especially if the password to be cracked is 2 or more chars). Using this guy's code: [URL] ..... as a starting point, I'm writing a program that will crack a password with a length of just 2 chars.

*/
int stringLength = 2;
char genRandom() {
return alphanum[rand() % stringLength];
}
int main() {
std::string password = "Sp";
srand(time(0));
std::string Str;

[code]....

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C++ :: Calculate Number Of Tickets And Apply Discount

Sep 8, 2013

I am trying to do a simple calculation. I just started C++ and learning about decisions. My program should calculate number of tickets and apply discount based on the number of tickets purchased. It will only execute one of the decisions.

#include <iostream>
using namespace std;
int main() {
double qty; // qty of tickets
double discount; // % of discount.

[Code] ....

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C++ :: Using Char Instead Of Unsigned To Calculate Numbers?

Mar 10, 2014

How do you use char instead of unsigned to calculate numbers? This is using char only and nothing else.

Step 1: I ask the user to enter a number.
Step 2: User enters a number.
Step 3: Number user entered is going to be that number squared or cubed or w/e.

For example;
"Enter a number: " 3
" Number you entered multiplied four times: " 81 (Since (3)*(3)*(3)*(3) = 81)

Another example;
"Enter a number: " 5
" Number you entered multiplied four times: " 625 (Since (5)*(5)*(5)*(5) = 625)

Code:
Char num;
cout << "Enter a number";
cin >> num;
cout << "Number you entered multiplied four times: " << (num)*(num)*(num)*(num) << endl;

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May 13, 2014

I am Trying to make my program read 10 integers from a user-named file using arrays, but I encountered logic error because the calculations turns out to be wrong. my question is, Am I supposed to use arrays with files? if so, What is wrong? it runs fine but only the calculation is WAY OFF!

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
const int SIZE = 10;
void input(const int a[], int size);
int getTotal(const int a[], int size);

[Code] ....

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Jul 11, 2014

I was trying to put mutex lock on shared memory but my code is not working. What I want is that if some process is putting something on shared memory segment, other process should not be able to access that segment. For testing , I create a server program which put data in shared memory and client program which access the data.

To test it, I put break point after:

pthread_mutex_lock(&(init_lock));

But I see that client program was able to access shared memory.

Below is code:

Server: Code: pthread_mutex_t init_lock = PTHREAD_MUTEX_INITIALIZER;
main()
{
char c;

[Code].....

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Feb 21, 2012

I am trying to apply gabor filter to a fingerprint for fingerprint enhancement using c.

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how to reduce the executation time ?

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Attached Images point1.jpg (12.9 KB)

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C++ :: Algorithm For All Possible Combinations?

Mar 7, 2013

A few days ago I got a "bright idea" to see if I could match a string, with an arbitrary length from 1 to 12, to its formulated sequence by using an algorithm to find all possible combinations of the integer combinations from 0 to 9 at each length (1 to 12).

Example: Desired numerical combinations from integers 1 to 3:

At Length 1:

1, 2, 3

At Length 2:

11, 12, 13, 21, 22, 23, 31, 32, 33

At Length 3:

111, 112, 113, 121, 122, 123, 131, 132, 133, 211, 212, 213, 221, 222, 223, 231, 232, 233, 311, 312, 313, 321, 322, 323, 331, 332, 333

And so on until the nth length (in my case a length of 12).

First off, I would like to say that this is not as easy as I thought. I clearly underestimated the problem seeing as I've spent hours attempting to write a working algorithm, but feel like I've made no progress.

Here are a few of my attempts:

Attempt 1:

#include <iostream>
#include <algorithm>
#include <math.h>
#include <string>

[Code]....

I can't exactly explain this one. It works if the length is 2 or less; however, the order of the output is horrendous.

Attempt 3: I tried using recursion, but only found myself getting more and more lost the further I tried developing my function. Cannot find my work for this attempt.

I would really like to figure this out on my own, but I am very stuck as you can see. I also lack time that I can spend working on this since im a full time student.

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Mar 4, 2014

I need to create a function that outputs all possible binary combinations. I'm really stumped on this. I have to do it with nested loops, and am not sure how to go about it. Below is what I tried so far.

The output should look like this:

00000000
00000001
00000010
00000011
00000100
...
11111110
11111111

Code:

void outputBinary(){
int a[2][2][2][2][2][2][2][2];
for (int i = 0; i < 2; i++){
for (int j = 0; j < 2; j++){

[Code] .....

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Nov 27, 2013

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Feb 26, 2015

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If i enter the sum e.g sum=7 and the program has to show all possible combinations which gives the sum of 7 the number of point does not play in row they might be two or maybe more.

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Jan 25, 2013

Code:

#include<stdio.h>
#include<string.h>
#define a 15

[Code]....

I am trying to print all combinations of a string but I couldn't figure out how to do loop for it. Code works only 2-3-4 letters words

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Feb 17, 2013

I am trying to write a program for printing all the combinations of a string. Why this program is giving the error message.

"First-chance exception at 0x761bc41f in word.exe: Microsoft C++ exception: std::out_of_range at memory location 0x0026f6b4..
Unhandled exception at 0x761bc41f in word.exe: Microsoft C++ exception: std::out_of_range at memory location 0x0026f6b4.." when i try to run this in MVS 2010

#include<iostream>
#include <stdio.h>
#include <string>
#include <stdlib.h>
#include<conio.h>
void combination(std::string input,int length,std::string buffer,int allowedno)

[Code] .....

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Jun 23, 2014

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output:
14690 has pairs 12345 + 2345
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lets say that x = 12345 and y =2345
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other formula can i have since if i use % and / i will have a lot of declarations....

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Feb 14, 2013

I have an integer vector of size "n".

e.g.
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vec.pushback(1);
vec.pushback(2);
vec.pushback(3);

Now I want to generate all possible combinations of size = {0, 1, 2, ... , n}.

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Apr 4, 2014

The first line of my input file is going to contain some number "T" which will represent the "combination length" of a list of random words. (In this case, they are Taco Bell items). The first number on the second line represents the number of unique items on the menu to get, and the second number on the second line represents the number of unique items that are supposed to be bought.

Basically the input will look like this: 2 3 2 taco burrito nacho

And the output looks like this: burritos nachos nacho taco burrito taco

This is what I have so far:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
int main(void){
int N, T, K;
char menu[N][20];

[Code] .....

What I am trying to get working right now is just to scan a file and put the strings into an array so then I can work on sorting the array. How can I add strings from a file into an array?

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Dec 22, 2013

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Example subset: 1,2,3,4,5,6 (six selected, no repeats).

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I will also need the opposites removed, meaning...if I have 1,3,5,7,9,11 then I need 2,4,6,8,10,12 eliminated from the final list.

This is for a game, where you must select all numbers right or no numbers right.

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Sep 21, 2014

The code below will generate combinations of numbers from 1 to 25 in an 15 numbers array. The only filter I've applied is that the sum of all the numbers in the vectors divided by 15 needs to be between 13 and 14.
I would like to count how many consecutive numbers there are in one combination, so that later i can apply another filter.. for example:

1 3 4 5 6 8 10 13 14 16 17 18 19 20 25

3 + 4 = 1
4 + 5 = 1
5 + 6 = 1
13 + 14 = 1
16 + 17 = 1
17 + 18 = 1
18 + 19 = 1
19 + 20 = 1
_____________

Count = 8, in this case..

I think it's not very difficult to do, but i just can't see how to do it.

#include <iostream>
#include <vector>
#include <numeric>

[Code]....

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Code:

cout<<"Enter Filename for input e.g(inp1.txt .... inp10.txt):"<<flush;
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if(inpfile.is_open())

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Dec 23, 2014

I've made a code to check whether or not a save file has been created correctly, but for some reason it always returns this line: readdata[qa]=='1' as true. in which qa is the counter I use in a for loop and readdata is a character array consisting of 50 characters that are either 0, 1 or 2.

this is the entire code:

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

[Code]....

at first is also went wrong at line 22 and also returned that as true, but then I added brackets and it worked.

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Sep 29, 2014

I am trying to concatenate two words from a file together. ex: "joe" "bob" into "joe bob". I have provided my function(s) below. I am somehow obtaining the terminal readout below. I have initialized my memory (I have to use dynamic, dont suggest fixing that). I have set up my char arrays (I HAVE TO USE CHAR ARRAYS (c-style string) DONT SUGGEST STRINGS) I know this is a weird way to do this, but it is academic. I am currently stuck. My file will read in to my tempfName and templName and will concatenate correctly into my tempName, but I am unable to correctly get into my (*playerPtr).name.

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<- nothing is put into (*playerPtr).name, why not?
joe bob joe bob
seg fault*/
/****************************************************************/
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Jun 3, 2013

I have a file which contains a year and the name of an associated file to be read. I need to extract the data in the txt file and perform some calculations.

( year data file)
2004 2004data.txt
2005 2005data.txt
2006 2006data.txt

Here is what I do. I first declare "char yeardata" and then pass "2004data.txt" to it. Then I call yeardata in ifstream to extract the data inside the file "2004data.txt". The problem is that char yeardata is not constant so I cannot pass the file to it. It doesn't work if I change "char yeardata" to "const char yeardata".

Code:
int oldnewcomp_temp(char* lcfile) {
using namespace std;

int year;
char yeardata;

[Code] ....

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