Base conversion

Question

please help with a program that converts any base to base 10 by accepting input from the user which is the base and the number they wish to convert. -1 should signal the end if the user's input

Answer 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("What is the number you want to convert?");
string num = Console.ReadLine();
Console.WriteLine("In what base is this number?");
int mathBase = int.Parse(Console.ReadLine());
double output = 0;
int j = 0;
char[] nums = num.ToCharArray();
for(int i=num.Length - 1; i>=0; i--) {
output = output + Math.Pow(mathBase,i) * Int32.Parse(nums[j].ToString()) * 1;
Console.WriteLine("i: " + i +", j:" + j + ", nums[j]: " + nums[j] + ", output: " + output + ", mathBase: " + mathBase + ", " + Math.Pow(mathBase,i) + ".");
j++;
}
Console.WriteLine("The number " + num + " in base 10 (Decimal) is " + output + ".");
Console.ReadLine();
}
}
}

Answer 2

how do you convert integer to string in c++

Answer 3

every integer can be string:
int num = 3;
string nums = num;

Answer 4

BTW it's C#