Base Converter

#include <iostream>
#include <cstring>
#include <cmath>
using namespace std;


int strToDecimal(int base, string num);


string decimalToBase(int number, int base);


int main()

{

  int menuChoice;

  int startBase;

  int numberInDecimal;

  string number;







  cout << "NUMBER BASE CONVERTER 2019" << endl;
  cout << "By: Suraj Joshi" << endl << endl;

  cout << "Enter number to convert: ";
  cin >> number;

  cout << "Choose your starting base: " << endl
       << "1. Binary" << endl
       << "2. Octal" << endl
       << "3. Decimal" << endl
       << "4. Hex" << endl;

  cin >> menuChoice;

  switch(menuChoice)

  {
    case 1:
    {

      startBase = 2;
      break;

    }
    case 2:
    {

      startBase = 8;
      break;

    }
    case 3:
    {

      startBase = 10;
      break;

    }
    case 4:
    {

      startBase = 16;
      break;

    }
    default:
    {

      startBase = 0;
      cout << "Invalid Choice..." << endl;
      break;

    }
  }


  numberInDecimal = strToDecimal(startBase, number);

  cout << "Binary: " << decimalToBase(numberInDecimal, 2) << endl;
  cout << "Decimal: " << numberInDecimal << endl;
  cout << "Octal: " << decimalToBase(numberInDecimal, 8) << endl;
  cout << "Hex: " << decimalToBase(numberInDecimal, 16) << endl;



  return 0;
}


// This is where the problem starts(I Believe) I never experianced the problem when this wasnt here
int strToDecimal(int base, string num)

{

int sum = 0;

for (int i = 0; num.length() - 1; ++i) {

if(num[i] > 64)

 sum += (num[i] - 55) * pow(base, num.length() - 1 - i);

 else

sum += (num[i] - 48) * pow(base, num.length() - 1 - i);

  }


return sum;

}

// this can be ingored, This isnt what is causing the problem but feel free to look at it, it isnt complete yet
string decimalToBase(int number, int base )
{
  int rem;
  string tempStr (1, number % base + 48);

while(number != 0){

rem = number % base;
number = number / base;

// str.insert(0, string(1, num % base + 48))
// or string tempStr (1, num % base + 48);
//str.insert(0, tempStr);

switch(rem)
{




} // switch

} // while



  return " ";

}