sinful crystal
Hey, I am relatively new to c++ and I have just moved on to functions in the tutorial I am following but I don't really understand them. Specifically I am following along with the banking practice problem and the top part I really dont understand. The code will be below for anyone who wouldn't mind helping.
Part I dont understand
void showBalance(double balance);
double deposit();
double withdraw(double balance);
silent sunBOT
young valley
Those are function declarations, they declare the existence of the functions.
sinful crystal
So the first line is a function and in the part in the brackets tells the function what it can use?
young valley
No, the first line declares the existence of a function called showBalance that takes in a double argument.
dusk olive
What datatype you can pass*
sinful crystal
No, the first line declares the existence of a function called `showBalance` tha...
For the double argument I am guessing it will only take the value from the balance varible, or will it take any value and then say that the value is from the balance variable?
young valley
Take any double value, the name there doesn't have much technical meaning at that location.
When you have a function definition then the name will become a variable containing that passed value.
sinful crystal
Ahh ok that makes more sense, what about the second line then? Ist hat just a varible called deposit inside the showbalance function?
young valley
It declares a function called deposit that doesn't take any arguments.
The three lines are separate statements.
sinful crystal
If it doesn't take any arguments what does it actually do then?
young valley
It can still do anything, just that it doesn't need the caller to pass anything.
It may retrieve the data it needs from somewhere else.
sinful crystal
So it can take in any data and do whatever it wants with it?
young valley
It doesn't take data from the caller.
sinful crystal
Oh ok so its just a function that returns a value as a double then I am guessing
young valley
Yes.