i have an executable that is encrypted; it is made in Visual C++. decrypt it? what i must to look for? I have some kind of files (.req extention) that have the content encoded by password type.
I have got to create a program that will gather input from the user and then encrypt & decrypt those characters.
I'm not very confident at coding so I'm sure many parts of my code are written poorly and not following the best practice so I have written a simple version of an algorithm where the program simply adds/subtracts a value of 2 to/from the ASCII values but I have discovered the use of the rand() and srand functions but I'm unsure how to go about using them within both my encrypt and decrypt function as a single value (static variable?).
I have an application which needs to connect to a database. It runs in the background so there is no user input. I therefore need to store the connection string. I want to encrypt the connection details and then store the encrypted information. My thinking is I would read the encrypted details, from wherever I store them, unencrypt them and then connect to my database.
I've done a bit of reading on this and the SHA1CryptoServiceProvider method seems like an option but it appears that this cannot be unencrypted.
How can decrypt the file that the program below encrypt?
// This program encrypts a file #include<iostream> #include<fstream> using namespace std; int main() { const int ENCRYPT=10; // amount to add to a chor const int SIZE= 255; // array size
I have been working on some C++ code that doesn't seem to be going right. I'm wanting it to read a (three-digit) integer representing the value to be encrypted, a (one-digit) integer representing the encryption key, encrypt the value and print the encrypted value. The encrypting method used is that each digit in the given number is replaced by ((the sum of that digit plus key) modulo 10) then the first and last “encrypted” digits are swapped.
For example, if the number entered was 216 and the key given was 7, after applying the encryption procedure described the first digit (2) would become 9, the middle digit (1) would become 8 and the last digit (6) would become 3. The first and last encrypted digits are then swapped. The program displays the encrypted number: that is 389 in this case.
#include <iostream> using namespace std; int main() { int isolateDigits(); int replaceDigits(); int swapDigit1withDigit3();
I was told to use a round function to round a number to give an integer number that is closer to the real value. (for example if the number is 114.67 I need to print an int value of 115 instead of 114)
I am not exactly sure how a round function works, but I am told to include math.h library. What I try doesn't seem to work.
What I have is a main function that takes input characters from the command prompt during the main function call, and coverts it to an integer array a using atoi. (starting at the 2nd character - the 1st is reserved for another call that I plan to reference later, and the 0th is obviously the ./function). A function is then called to find the mode of an array (the range of values in the array is 1-30). Now, when I run the whole thing, I get a segmentation fault (core dumped) for even number of arguments. It's late and I've been staring at it for too long...
Code: #include <stdio.h> #include <stdlib.h> int get_mode(int a[], int count);
I have this code(homework) i've been working on for several days i couldn't fix this error.
Question is: to write a sort program in c . Ineed to ask user for how many numbers to be sorted(n) ask again for values. The approach of sort is this:
1- store n in temporary var (temp) 2- search for largest number in array (0 until temp-1) 3- switch the fied that store largest with field indexed by (temp-1) 4- temp-- (decrement) 5- repeat steps 2 to 4 until temp is 1
the program then prints the numbers of array on screen in one line. I also should use a function getMax(int *list , int n) that determines largest value and returns its location in that array
list : is the array n: number of elements
Code: #include<stdio.h> int getMax(int *list, int n); //definition of getMax function int main(void) { int n,i;
[Code] .....
so i tried to sort this array
Code: input 2 7 9 4 3 1 6 5 The out put should be : 9 7 6 5 4 3 2 1 instead it prints : 7 9 2 4 3 1 6
So in this function it is already passing the array into the function but the thing is one parameter being passed into the function and if so how do I go about passing 3 arrays as parameters into the function? Also the program only asks for a user entry of hours for three different cars so why would there be a point in making two additional arrays to be passed into the function?
#include <iostream> #include <iomanip> using namespace std; //passing array into function double calculateCharges(double hours[], int HoursArrayLocation);//call function
In my program, i have a function, example: bool open(string szString); this function i have known it's fix address, example: 0x12345678 Because of my computer which has low capability, if this function is called 1000 times per second it will be hanged, slow. So i want limit the number of function call down to 500 times per second. how will i do with C/C++?
Code: #include <iostream> int multiply (double x, double y) { double result = x*y; return (result);
[Code] ....
I get the answer 5.94 (which is what I'm looking for). I can't work out why the first example is not outputting a decimal number. I have set the variables as a double so I just can't see why this is not working for me.
I use rand function to generate a number which consists of 3-5 digits(e.134,1435,73463..). The user decides whether he wants a 3 digit,4 digit or 5 digit number.After that,the user tries to guess the number.Its like mastermind game.The user will enter a number (with the same amount of digits) and the program will calculate how many digits from the secret number he has found and also how many digits he has found in the correct position(e.if the generatir produces the number 32541 and the user tries the number 49581 the program should tell him that he found 3 digits (5,1,4) and 2 digits in the correct position(5,1)) so that after some tries he finds the secret number.My problem is with the functions so that i can compare the digit of each number,find the amount of same digits and the amount of digits in same position.
I just want to practice in the language so i wrote this simple function that computes the factorial result of a certain number. The problem is that for all numbers > 20, the results are wrong ( < 20 all good).
I already learned that normal "long" type in c is more like 32 bit int and not 64 bit like a long type in java. so I used here a "long long" type.
why am I getting strange results above the number 20? isn't 64 bit enough to hold those numbers?
Code: long long factorial(int n); int main() { long long result = factorial(20); printf("%lld",result);
[code] ...
for 21 i get: -4249290049419214848
where the right result shoud be: 51,090,942,171,709,440,000
C programming, make it use a function call to print the smallest number? this is a program which prints out the smallest of three numbers within the main function that I was asked to write.Now the other question i am asked,5. Re-write the program, uses a function call to print the smallest number?
Code:
# include <stdio.h>
main() { int a,b,c; int temp, min; a = 100; b = 23; c = 5; }
I need to create a function that takes as an input a variable number of scalars and returns the biggest one. Just like std::max() does for 2 elements, but I need it for an undefined number of elements, can be 2, or 5, or 10 etc.. How to approach this?
What I need it for: I'm working with a bunch of vectors, maps, etc. and I need to find out which has the most elements. So I was thinking that I should end up with something like
int biggest = max(vector1.size(), vector2.size(), map1.size(), ...);
I have a class called items and stored in a vector as vector<items*> item.now I want to make a function to return the placement # that the item is stored at with a unsigned int. but if I don't find the item is there like a null unsigned int that can be returned.
unsigned int someFunc(vector<items*> item) { unsigned int size = item.size(); for (unsigned int i = 0; i < size; ++i) { if (item[i]->getItemName() == "sword") { return i; } } //i need code here incase the item is not there }
because the item might not be there and i would like to do a line if(unsigned int) do this code