How Can I change the code to ask user to input the key instead of write it directly into the code, like Vigenere cipher(“VIGENERECIPHER”).#include <iostream>#include <string>using namespace std; class Vigenere{public: string key; Vigenere(string key) { for(int i = 0; i < key.size(); ++i) { if(key[i] >= ‘A’ && key[i] <= ‘Z’) this->key += key[i]; else if(key[i] >= ‘a’ && key[i] <= ‘z’)
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