Topics covered: Order of operations in C++, simple interest formula / calculation, compounding interest formula calculation

Source code:

```#include using namespace std; ```

``` int main(){ //PEMDAS //In math -- Parenthesis, Exponents, Mult / division, add / sub //In C++ Paren. -- Evaluated first //Mult / Div //Add / Sub -- Last in priority //Evaluates left to right //1*5-4*3 //5-12 double principal=0, rate=0, time=0; cout << "What is the initial investment? "; cin >> principal; cout << "What is annual percentage yield (APY -- APR)? "; cin >> rate; cout << "How many years will this be invested for? "; cin >> time; ```

``` cout << "The amount of money at the end of the time period will be: "; return (0); }```

Order of operations
In C++, there is an order of operations, much like the one that we see in traditional mathematics. In C++, the order of operations is as follows:

1. Parenthesis
2. Multiplication and Division
The Cmath library contains a lot of useful things, for instance square root (sqrt) floating point modulo (fmod / fmodf) and more. In this case we are using 'pow' which is used like this: `pow(double, int);`