c++ - 在二维数组 C++ 中打印一个字符串

Question

我想问一下如何在二维数组中随机打印 Chessmaster 这个词的每个字母？我试过 srand 但我不知道如何将它与字符结合起来。有人可以帮我是代码。另外，我可以在没有 rand 的二维数组中创建随机字母吗？

#include <iostream>
#include <stdlib.h>
#include <time.h>

const int MAX = 11;

using namespace std;

void printwo()
{
    char word[MAX] = {'c', 'h', 'e', 's', 's', 'm', 'a', 's', 't', 'e', 'r'};
    int c, i, n, letters;

    cout << "I will print this word " << word << " sepereate" << endl;
    srand(time(NULL));

    for (int i = 0; i < 7; i++)
    {
        for (int j = 0; j < 2; j++)
        {
            cout << "Print a random letter["
                 << "][" << word[i] << "]"
                 << "["
                 << "]";
            cout << endl;
        }
    }
}

int main()
{
    int c;

    cout << "Hello user press  _1_ to continue" << endl;
    cin >> c;

    if (c == 1)
    {
        printwo();
    }
    else
    {
        cout << "Bye";
        exit(0);
    }
    return 0;
}

Answer 1

#include <iostream>
#include <stdlib.h>
#include <time.h>

const int MAX = 11;

using namespace std;

// Generate a random number between min and max (inclusive)
// Assumes std::srand() has already been called
// Assumes max - min <= RAND_MAX
int getRandomNumber(int min, int max)
{
    static constexpr double fraction { 1.0 / (RAND_MAX + 1.0) };  // static used for efficiency, so we only calculate this value once
    // evenly distribute the random number across our range
    return min + static_cast<int>((max - min + 1) * (std::rand() * fraction));
}

void printwo()
{
    char word[MAX+1] = {"chessmaster"}; //If you are using C-style strings then you should declare +1 space
    //int c, i, n, letters; not needed

    cout << "I will print this word " << word << " sepereate" << endl;

    //srand only gives a seed to yout tand function, you need to call std::rand() to get a random integer
    //use the function getRandomNumber above that is based on rand() and gives you the possibility to select range
    srand(time(NULL));

    for (int i = 0; i < 7; i++)
    {
        for (int j = 0; j < 2; j++)
        {
            cout << "Print a random letter["
                 << "][" << word[getRandomNumber(0,10)] << "]" 
                 << "["
                 << "]";
            cout << endl;
        }
    }
}

int main()
{        
    int c;
    cout << "Hello user press  _1_ to continue" << endl;
    cin >> c;

    if (c == 1)
    {
        printwo();
    }
    else
    {
        cout << "Bye";
        //exit(0); exit here not needed
    }
    return 0;
}

我写了一些评论.. 请阅读它们并问我是否有什么不明白的。我建议在这里阅读有关 C 风格字符串和 rand() 的内容: 兰德()-https://www.learncpp.com/cpp-tutorial/59-random-number-generation/ C 风格的字符串(基本上是 char 数组)- https://www.learncpp.com/cpp-tutorial/66-c-style-strings/