Question

#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <cctype>
#include <ctime>
#include <iomanip>

using namespace std;

int randchar(void)
{//rand char generation
int c = ' ';

    while (!isalpha(c))

        {
        c = rand() * 1010110;
        c %= 26;
        c += 'a';
        c %= 'z';
        }

    return c;

}//end randchar

int main(int argc, char * argv[], char **env)
{//array input and processing
char c;
string s;

c = cin.get();

while (!cin.eof())
{//run until end of message

    if(isalpha(c))
        s = s + c;

    c = cin.get();

    //cout <<"s is: " << s.length() <<"\n";

    int length = s.length(), side=1, count=0, row, col;


    while((side * side) < length) //start matrix as one by one increase until string length = width/length of array sides
            side++;

     char matrix[side][side];//create char matrix [side][side]


    for(row=0; row < side; row++) //increase rows until same size as side
    {

        for (col=0; col < side; col++)//increase cols until same size as side
        {

            if (count < length)//if count is less than string length

                {
                matrix[row][col] = s[count++];//fill matrix[row][column] using string s until count = string length
                }

            else

                {
                matrix[row][col] = randchar(); //if count >= string length, fill remaining space with rand characters
                count++;
                }//else end

        }//for ends

    }//for ends
    for (col=0; col < side; col++)

    {

      for (row=0; row < side; row++)

        cout << matrix[row][col]; //prints out final encrypted array

    }//for ends
}//while end

}//end main

所以我在确定为什么这个代码打印出从1 x 1到s.length（）x s.length（）的每个数组而不是仅打印最终加密数组时遇到问题。 abcdefghi应打印出adgbehcfi，但它打印aaIboacbgacbdadIbeWcSMadMbeecfkadgbemcfQadgbehcfc adgbehcfi ，按Enter键后， adgbehcfi 。

我想我需要在while循环结束后打印出数组，或者我在这里错过了其他的东西？任何帮助将不胜感激。

Answer 1

你做了一个嵌套的for循环，循环所有行和matrix数组的所有列，并将print语句cout << matrix[row][col];放在这个嵌套循环中。因此它将针对每行和每列执行。要解决此问题，您可以删除for循环，替换为：

for (col=0; col < side; col++)
{
    for (row=0; row < side; row++)
        cout << matrix[row][col]; //prints out final encrypted array
}//for ends

由此：

cout << matrix[side-1][side-1]; //prints out final encrypted array

凯撒转移问题

1 个答案: