[help] loan program equation

[mitch310]

hi guys I'm new to this forum and this is my first post! anyways I'm having a bit of trouble with this equation that calculates how much one can borrow. I don't really know what's going wrong. If anyone can help that'd be great thanks!

//how much money can i borrow
if (choice == "2")
{
cout << fixed << setprecision(2);
//declaring variables
double p = 0.0; //answer, borrowed money
double r = 0.0; //monthly interest rate
double n = 0.0; //number of months you'll be paying
double m = 0.0; // monthly payment
//prompting the user to give us info
cout << "what is the annual interest rate on your loan?: ";
cin >> r;
cout << "what is your monthly payment in dollars?: ";
cin >> m;
cout << "what is the number of months you intend to pay?: ";
cin >> n;

p = (m * pow(1+(r/100/12),n) -1) / (r/100/12) * (pow(1+(r/100/12),n));

cout << "you can borrow " << p << " dollars\n";
}
like I said everything else is fine there is just something wrong with the equation

[ats15]

Are you sure r is monthly interest rate, not yearly? If yes, why divide by 12?

[48T7M4Gy]

Presumably you were given the equation using ordinary algebraic notation and you have translated it to this rather strange concoction which you are not able to do what you want
p = (m * pow(1+(r/100/12),n) -1) / (r/100/12) * (pow(1+(r/100/12),n));

Please show us the original equation.