Compound Interest with recursion help

[mastern200]

I need to make a program that calculates Compound Interest (compounded monthly). Thing is, it has to use recursion. I don't know how to implement it in though. This is the code i have so far.

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

float initialDeposit=0;
int depositMonth=0;
float interestRate=0;
float total=0;
void mainFunction();
void endingBalance();
bool goAgain();
   
int main() {
    do{
    system("cls");
    mainFunction();
    endingBalance();
   
    }while(goAgain());
    cin.get();
    cin.get();
    return 0;
}

void mainFunction(){
    cout<<"What is the initial deposit? ";
    cin>>initialDeposit;
    cout<<endl;
    cout<<"How many months is the deposit? ";
    cin>>depositMonth;
    cout<<endl;
    cout<<"What is the annual interest rate? ";
    cin>>interestRate;
    cout<<endl;
}

void endingBalance(){
     cout<<"With an initial deposit of $";cout<<initialDeposit;cout<<" and an interest rate of "; cout << interestRate; cout<<"% the balance at the end of ";cout<<depositMonth; cout<< " months is $"; cout<<total; cout<<".";
     cout<<endl;
     }

bool goAgain()
{
     char answer;

     cout << "Would you like to go again?";
     cin >> answer;


    while(answer != 'y' && answer != 'Y' && answer != 'n' && answer != 'N')
    {
      cout << "Invalid choice.  Would you like to go again?";
      cin >> answer;
    }

    cout << endl;
   

    if(answer == 'y' || answer == 'Y')
      return true;
    else
      return false;
}

[enri]

mastern2000,

this would probably do the trick:

double Compound(double capital, double interest, int months)
{
     if (months==1)
          return capital*(1+interest);
     else
          return (1+interest)*Compound(capital,interest, months--);
}

[AdrianH]

mastern2000,

this would probably do the trick:

double Compound(double capital, double interest, int months)
{
     if (months==1)
          return capital*(1+interest);
     else
          return (1+interest)*Compound(capital,interest, months--);
}

Yes, it probably would, but I would like to point out that we are here to help one another by giving pointers, hints and methods of doing things, not give out the answers. Stating a potential algorithm in words or pseudo-code would be a better way of helping.

Not to be heavy handed, but please think about what you are writing before giving out a solution. Try and not do that again.

Thanks.


Adrian