pepcoding.com 21/10/2021 printKPC

code.cpp

#include <iostream>
using namespace std;

string codes[] = {".;", "abc", "def", "ghi", "jkl", "mno", "pqrs", "tu", "vwx", "yz"};

void printKPC(string ques, string asf){
    if(ques.length() == 0) {  //base case
        cout << asf << endl;
        return;
    }
    
    int idx = ques[0] - '0';  // converting the first character to number for index.
    
    for(int i = 0; i < codes[idx].length(); i++) {  // loop for traversing the string at idx index of codes array
        
        string str = codes[idx];  // the string at idx location in codes array
        char ch = str[i];  // character to add to asf
        
        printKPC(ques.substr(1), asf + ch);  // recursive call
    }
    
}

int main(){
    string str;
    cin >> str; // input
    printKPC(str, ""); // function call
}

snippet.cpp

#include <iostream>
using namespace std;

string codes[] = {".;", "abc", "def", "ghi", "jkl", "mno", "pqrs", "tu", "vwx", "yz"};

void printKPC(string ques, string asf){
    // write your code here
    
}

int main(){
    string str;
    cin >> str; // input
    printKPC(str, ""); // function call
}