Thread: Newbie function trouble

Hi,

I am trying to learn functions but the book I'm using places the arguments into the function 'manually', they are 'constants'.

I'm trying to pass the arguments to the function by using variables.

Here is my code:-

Code:

#include <iostream>

using namespace std;

void box(int length, int width, int height);

int main()
{
    int length;
    int width;
    int height;

	cout << "Enter length of the box " << endl;
	cin >> length;
	cout << "Enter length of the box " << endl;
	cin >> width;
	cout << "Enter length of the box " << endl;
	cin >> height;
	box();
	
	system("pause");

	return 0;
}

void box(length, width, height)
{
	cout << "The volume of the box is " << length * width * height << endl;
}

This isn't compiling, using Dev-C++ it is saying:-

Line:5 "too few arguments to function `void box(int, int, int)'

Line 5 is-

void box(int length, int width, int height);

I'm confused as this line is straight from the book.

Could anyone be so kind as to offer me some pointers?

Many thanks!

And also, since you're telling the compiler that box needs three numbers, you need to bloody well give box three numbers:

Code:

	cout << "Enter length of the box " << endl;
	cin >> length;
	cout << "Enter length of the box " << endl;
	cin >> width;
	cout << "Enter length of the box " << endl;
	cin >> height;
	box(length, width, height);

Originally Posted by swgh

I somtimes wish books would stop having "using namespace std;" as a common thing to use. Problems can occur later on when using real namespaces and classes for example, and including the entire namespace on simple programs is not needed. All books should really use the std:: prefixes.

It's probably because brevity is more important in a paper book than in a source file - even Stroustrup's book leaves out std:: in its code snippets. (BTW, it's spelled "propane", without an i, and "accessories".)