c++ - 随机化字符数组以显示随 secret 码

Question

我的任务是创建一个将为用户生成安全密码的解决方案。我需要...

1. 提示用户输入密码的长度，密码的个数特殊字符以及数字的数量。

   然后应使用这些输入随机生成密码。

例如输出:

密码长度是多少？ 8

有多少个特殊字符？ 2

有多少个数字？ 2

您的密码是:aun2$1s#

我的编程水平处于初学者阶段，这是我到目前为止所做的示例

#include <iostream>
#include <algorithm>
using namespace std;

void WorkoutPass(int ,int,int);

int passlength;
int specChar;
int number;


int main()
{
    cout << "Enter the length of password: ";
    cin >> passlength;


if (passlength > 0)
{
        cout << "Enter the amount of special characters: ";
        cin >> specChar;
        if (specChar > passlength)
        {
            cout << "Error - invalid value entered is above the length of password";
        }
        cout << "Enter amount of numbers";
        cin >> number;
        if (number > passlength)
        {
            cout << "Error - invalid value entered is above the length of password";
        }
        WorkoutPass(passlength, specChar, number);

}
else
{
    cout << "Error - invalid value entered password must be above zero";
}
return 0;
}


void WorkoutPass(int p, int s, int n)
{
string password;

char alphaBetArray[26] = {'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'};
char specCharArray[10] = {'!','£','$','%','&','@','~','#','>','<'};
char numberArray[10] = {'1','2','3','4','5','6','7','8','9','10'};


int numberOfLetters = p - s - n;


char letter;

// generate (numberOfLetters) letters

// each letter generated we add to the string
password += letter;

// Add special characters
// Add numbers



random_shuffle(password.begin(), password.end());

cout << password.c_str() << endl;
}
 void DisplayPass()
{

}

Answer 1

c++17有介绍sample您需要将其与您已经准备好的 random_shuffle 一起使用以生成 password:

random_device rd;
mt19937 g(rd());
auto it = sample(cbegin(alphaBetArray), cend(alphaBetArray), begin(password), numberOfLetters, g);

it = sample(cbegin(specCharArray), cend(specCharArray), it, s, g);
sample(cbegin(numberArray), cend(numberArray), it, n, g);

Live Example

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一些注意事项:

1. 您的数组并不全面，编写一个 lambda 来随机生成一个范围内的字符可能是一个更好的选择，您可以使用 generate_n 来做到这一点.
2. random_shuffle 在 c++14 中被弃用你需要使用 shuffle现在