I'm new to C++ and I'm studying out of a book (Game Programming - All In One, 2002) From what I've seen from other programs it's sort of out of date. Can someone tel me what's wrong with this?

-Error C2734: 'Value' : const object must be initialized if not extern


(It origionaly used std::cout and std::cin)

#include <iostream>
using namespace std;



main (void)
{
const float Value, FeetPerMeter = Value;
float Length1;
float Length2;
float Length3;

cout << "Enter the first lenght in meters: ";
cin >> Length1;
cout << "Enter the second length in meters: ";
cin >> Length2;
cout << "Enter the third lenght in meters: ";
cin >> Length3;

cout << "First length in feet is: " << Length1 * FeetPerMeter << endl;
cout << "Second length in feet is: " << Length2 * FeetPerMeter << endl;
cout << "Third length in feet is: " << Length3 * FeetPerMeter << endl;

return 0;
}

This is what the book told me to insert, but it even looks incorrect to me. HMM, does anyone know what's wrong with this?

Well, I put in a number and then it worked not as i planed although. First i enterd the first, then the second, then the third. Then it just shuts the window concole.

In the code you posted, Value does not have a value (as the error message tried to tell you).

It sounds like an issue with the environment you are running it out of. Perhaps if you ran your program from a command line it would work as expected. But you may find a remedy by adding this line right before the 'return 0;' of main. Explanation. Cure.

Don't use const(ant) float.Try using a normal float .
Once a constant is initialised it's value cant be changed AND you have to initialise a constant ALWAYS.

const float num = 10;
const float num1 = num;

The above will work. :!: