隨意茶部落

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

struct money
{
    int P;
    int F;
    double r;
    int n;
};

int presentValue(int prevalue, double rate, int year);

void main()
{
    money M;
    cout << "what is your present value ?" << endl;
    cin >> M.F;
    cout << "the year you want to save :" << endl;
    cin >> M.n;
    cout << "the rate :" << endl;
    cin >> M.r;

    cout << "the money you have to deposit :" << presentValue(M.F, M.r, M.n) << endl;

    system("pause");

}

int presentValue(int prevalue, double rate, int year)
{
    int p=0;
    double s = (1 + rate);
    
    double pp = prevalue / pow(s, year);
     p = pp + 1;
    
    return p;
}