this maybe?

Code:
#include <iostream>
using namespace std;

double futureInvestmentValue ( double investmentAmount,
                               double monthlyInterestRate,
                                int years);

int main()
{






  system ("pause");
  return 0;
}


double futureInvestmentValue ( double investmentAmount,
                               double monthlyInterestRate,
                                int years)
{

   // FV = PV ( 1 + i)

   //   investmentAmount * (1 + monthlyInterestRate);

 

}