I. C triple base - nedovurshena

#include <iostream>
#include <string>
#include <bits/stdc++.h>



using namespace std;

//char arr[] = "1+–0–5";
//char arr[] = "++–0–+";
//char arr[] = "–+–0–+";
string inputString = "++0--";

int returnNum(string input)
{
    int stringLength = input.length();

    // declaring character array
    char arr[stringLength + 1];
    strcpy(arr, input.c_str());

    int length = sizeof(arr) / sizeof(arr[0]);
    int prevPower= 0;
    int sum = 0;
    for(int i =length-2; i>=0;i--)
    {
        int currentPosReverse = (length-2)-i;
        int currentNum = 3*prevPower;


        if(prevPower ==0)
        {
            currentNum =1;

        }

        prevPower = currentNum;
        if(arr[i] == '–')
        {
           // cout << "Vliza  tuK " << i <<"  " << arr[i] << endl;
            currentNum = currentNum*(-1);
        }
        if(arr[i] =='0')
        {
            currentNum = 0;

        }

        sum+=currentNum;
        //cout << currentPosReverse << arr[i] << endl;
    }
    cout << "The sum is: " << sum << endl;
    return sum;



}


int main()
{

    int res = returnNum(inputString);
    cout << res << endl;

}