Programming Forums - Slight problem with my code

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Slight problem with my code

I'm writing a program where I'm writing my own method to calculate something. The user is asked to enter 3 integers, and then the program calls a method called Sum to compute the sum and display it. But I'm getting a compiler error. I don't know why since I'm taking a concept from my book and just applying it to my own program, but what I got written is pretty much exactly the same way the program looks in the book. Here is my program:

using System;



    class Program

    {

        static void Main()

        {

            int number1, number2, number3;



            Console.Write("Enter 3 integers: ");

            number1 = Convert.ToInt32(Console.ReadLine());

            number2 = Convert.ToInt32(Console.ReadLine());

            number3 = Convert.ToInt32(Console.ReadLine());



            Console.WriteLine("The sum is ", Sum(number1, number2, number3));

            Console.WriteLine();

        }

    }



static int Sum(int a, int b, int c)

{

    int sumTotal;

    

    sumTotal = a + b + c;



    return sumTotal;

}

But the compiler flags the word "int" right after the word "static" in my method definition and says something about a class, delegate, enum, or
struct is expected.

So I'm kind of confused as to why there is a problem.

the Sum() function or any for that matter needs to be in the Program class or a new class/struct etc. ie...

using System;
class Program
{
 
// ..... main block { }
 
static int Sum()
{
// .... code
}
}

P.S the code will compile then but there are a couple of things:
Console.WriteLine("The sum is ", Sum(number1, number2, number3)); // "," seperates the parameters passed so unless the WriteLine() function's second parameter also displays text it won't work
// should be
Console.WriteLine("The sum is " + Sum(number1, number2, number3)); // + to join the string and functions return value

^-- if that's how it was in the book and it works sorry, the book > me =P

* might want to think about adding a Console.ReadKey() so you can see the results :P

Yeah, I just discovered that little error. My program works good now, but how do you split a long line of code into two lines? For example I have this line of code that is rather long:

Console.WriteLine("{0}{1}", "The largest is ", Maximum(number1, number2, number3));

Not only is it too long to print on one line when I print my code out, but even in the editor window it looks too long. I tried one method of breaking it up but the compiler wouldn't go for it.

Console.WriteLine("{0}{1}", "The largest is ",

 Maximum(number1, number2, number3));

Just hit enter :P . Unless you're in a string , the compiler won't mind.