My first application, savings calculator

[ybRX92yv]

Hi guys, relatively new here.
Decided to pick up C++ after a long time, and I'm still in novice mode.
I'm studying from myself, through books, and my first attempt with the tutorial is a financial program, the user gives base capital, interest, and the amount of years.
The program then calculates your end capital (savings) using the well known formula:

Basecapital * (Interest ^ Years)

Now I run into a couple of problems, first thing is the interest isn't properly working.
If someone enters 5, I want to calculate 1.05 from that, I did that using this line:
realinterest = (rawinterest + 100) *0,01;
Enter 5? Should be 5+100, multiplied by 0,01 which would make 1.05.
As a test I cout the real interest and it returns zero.
So my decimals aren't existing, 1.05 turns magically into zero.

Secondly, the compilers keeps giving me messages: Illegal operand: left type has float.
I think it's telling me that the float type is not usable here, but to work with decimals I can't use int right?
Could someone provide assistance? Thanks!

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// first application in C++ #include <iostream> #include <string> using namespace std; int main () { int age; //initializing variables and strings int agemom; int agetotal; string job; int startcapital; float rawinterest; float realinterest; float years; int endcapital;

//THIS WORKS cout << "Hello World" << endl; //printing text cout << "This program is written in C++" << endl; cout << "Enter your age" << endl; cin >> age; //input of age cout << "So you are " << age << " years old." << endl; cout << "How old is your mom?" << endl; cin >> agemom; //process agetotal = age + agemom; cout << "Whoa, combined you and your mom are " << agetotal << " old." << endl; //output cout << "Where do you work?" << endl; cin >> job; cout << "It must be really difficult working at " << job << endl; -------------------------------------------------------------------------------------------------------------- //THIS PART DOESN'T WORK cout << "This program can also calculate your future savings" << endl; cout << "Enter the amount of capital to begin with" << endl; cin >> startcapital; cout << "Enter the annual percentage of interest" << endl; cin >> rawinterest; realinterest = (rawinterest + 100) *0,01; cout << "Enter the amount of years you're saving money" << endl; cin >> years; cout << realinterest; endcapital = (startcapital) * (realinterest ^ years); cout << "Okay, your " << startcapital << " will be worth " << endcapital << " after " << years << " years."; system("pause"); //pause return 0; } -----------------------------------------------------------------------------------------------------------------

[Branflakes91093]

realinterest = (rawinterest + 100) * 0.01; You must use '.' to denote decimal places, always.

'^' does not mean to-the-power-of in C++. Include <cmath> and use pow(): http://www.cplusplus.com/reference/cmath/pow/

#include <cmath>
endcapital = (startcapital) * pow(realinterest, years);