pepcoding.com 21/10/2021 printEncodings

code.cpp

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

void printEncoding(string str, string asf){
    if(str.length() == 0) {  // base case
        cout << asf << endl;
        return;
    }
    
    int ch = str[0] - '0';  // picking first character and converting to integer
    string ros = str.substr(1);  // substring staring from index 1 to pass in recursive call
    
    if(str.length() == 1) {  // only work when string length is one i.e. single character
        printEncoding(ros, asf + (char)(ch + 'a' - 1));
    } else {
        if(ch == 0) return;  // handling invalid input 0
        
        printEncoding(ros, asf + (char)(ch + 'a' - 1));  // first choice
        
        ch = stoi(str.substr(0, 2));  // picking 2 digit integer
        
        ros = str.substr(2);  // now ros starts from index 2
        
        if(ch <= 26) {  
            printEncoding(ros, asf + (char)(ch + 'a' - 1));  // second choice
        }
    }
    
}

int main(){
    string str;
    cin>>str;
    printEncoding(str,"");
}

snippet.cpp

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

void printEncoding(string str, string asf){
    // write your code here
    
}

int main(){
    string str;
    cin>>str;
    printEncoding(str,"");
}